Skocz do pozycji: 1.

Tytuł:

Design and effectiveness verification of sound reduction measures in production hall

Autorzy:

Moravec, M.
Liptai, P.
Dzuro, T.
Badida, M.

Powiązania:

https://bibliotekanauki.pl/articles/103293.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

sound insulating measures
sound analysis
sound measurements
design

Opis:

The main aim of the work described in this paper was to design and validate measures to reduce noise levels in a training center. This training center serves for the practical training of students with the focus in the shaping and machining engineering products. Reduction of noise in the training center was mainly due to the clarity and hearing of the spoken word between the lecturer and students, as well as to reduce the risk of hearing damage. In order to reduce noise levels, it was proposed to overlap the training center with a roof structure filled with sound absorbing material in two solutions. The noise absorption coefficient of the selected material was determined on the impedance tube. For verification of effectiveness, measurements of equivalent A sound levels were made before and after realization noise reduction measures. Reduction of equivalent A sound pressure levels after the noise reduction measures are between 15.5 dB and 17.5 dB depending on the measuring point and the operating mode. The effectiveness of the implemented measures reaches a good level, as noise was reduced to the recommended legislative level.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 4; 220-224
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Audiosfera jako kategoria literaturoznawcza. Próba przybliżenia zagadnienia
Audiosphere as a Category of Literary Studies. An Attempt to Bring the Issue Closer

Autorzy:

Piaskowski, Łukasz

Powiązania:

https://bibliotekanauki.pl/articles/1068777.pdf

Data publikacji:

2021-03-11

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

sound
audiosphere
soundscape
sound in poetry
sound studies

Opis:

The audiosphere is a capacious, ambiguous category, often freely used in contextual research. It is a term that has long been present in literary studies, but is used quite freely. The aim of this article will be an in-depth look at the ways of using the word 'audiosphere' and, finally, an attempt to specify research meanings useful in the context of literary studies. The terminology that organizes the sound order of a language exists in the study of literature in two modes. Each mode represents a different path in the development of the field of meanings of the audiosphere category. The first of them was developed by literary researchers as early as the 1980s, where the audiosphere was identified with the audial medium of presenting a literary text, i.e. with singing, recitation or speech. The second mode was subordinated to contemporary influences of cultural anthropology. The creation of sound studies and the so-called sound anthropology resulted in a flood of new meanings of the word 'sound', as well as the need to develop cognitively useful descriptive categories. In this context, the audiosphere is a very Polish term. It is mainly used by Polish researchers, strictly distinguishing it from the soundscape category, which is more common in Western studies. In the article, the two models outlined above will be confronted with each other, and the purpose of this juxtaposition will be to cause shifts in terms of meanings. On the basis of a relatively outlined definition, the basic features of the audiosphere within literary research will be listed. This will make it possible to clarify which specific features of this category are useful in the context of literary studies and which should be rejected. Ultimately, it is about working out the possibility of creating a model of audial interpretation of a poetic text.

Źródło:

Zagadnienia Rodzajów Literackich; 2020, 63, 4; 133-150
0084-4446

Pojawia się w:

Zagadnienia Rodzajów Literackich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Binaural and Ambisonic Sound as the Future Standard of Digital Games

Autorzy:

Farkaš, Tomáš

Powiązania:

https://bibliotekanauki.pl/articles/485113.pdf

Data publikacji:

2018

Wydawca:

Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie

Tematy:

ambisonic sound
binaural sound
difficulty
digital games
film
graphics
sound

Opis:

The author of this study suggests an idea that the auditive element of digital games is soon going to be one of the most important factors influencing their overall success, popularity, and originality. He analyses the phenomenon of binaural and ambisonic sound, its evolution and uses in the context of modern audio-visual work, primarily focusing on games. The auditive component and its increasingly important role are analyzed in connection with the graphic design of games, virtual reality, as well as the popularity of specific games. This paper also focuses on audio-games, the use of binaural sound (which was first used on a large scale in Hellblade: Senua’s Sacrifice) and various hybrid digital games, which are balancing between classic games and audio-games. Argumentation is based on an assumption that binaural sound is the way to ambisonic sound, which (within the context of the immersive and interactive character of digital games) predestines the new standard and shows an entirely new way of creating and using digital games at the same time. All of this is reflected in the context of the graphic design of digital games and their future.

Źródło:

Acta Ludologica; 2018, 1, 2; 34-46
2585-8599

Pojawia się w:

Acta Ludologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

The Characteristic of Sound Reflections from Curved Reflective Panels

Autorzy:

Szeląg, A.
Kamisiński, T.
Lewińska, M.
Rubacha, J.
Pilch, A.

Powiązania:

https://bibliotekanauki.pl/articles/177712.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound reflection
reflective panels
sound scattering

Opis:

The paper presents the verification of a solution to the narrow sound frequency range problem of flat reflective panels. The analytical, numerical and experimental studies concerned flat panels, panels with curved edges and also semicircular elements. There were compared the characteristics of sound reflected from the studied elements in order to verify which panel will provide effective sound reflection and also scattering in the required band of higher frequencies, i.e. above the upper limit frequency. Based on the conducted analyzes, it was found that among some presented solutions to narrow sound frequency range problem, the array composed of panels with curved edges is the most preferred one. Nevertheless, its reflection characteristic does not meet all of the requirements, therefore, it is necessary to search for another solution of canopy which is effective over a wide frequency range.

Źródło:

Archives of Acoustics; 2014, 39, 4; 549-558
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Ontoestetyka dźwięku i kultura słuchania. Dyskurs metateoretyczny sound studies
Onto-aesthetics of Sound and Auditory Culture. Metatheoretical Discourse in Sound Studies

Autorzy:

Lniak, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/1068813.pdf

Data publikacji:

2021-03-11

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

sound studies
onto-aesthetics
auditory culture
sound culture studies
sound machineries

Opis:

The article presents a critical approach to the sound studies debate, concerning its metatheoretical aspects. The point of departure is a paper by Brian Kane that opens the first issue of “Sound Studies: An Interdisciplinary Journal”. Kane criticizes the ontoaesthetic perspective within the discipline. My aim is to introduce sound studies both as an interdisciplinary and transdisciplinary field of humanities, dominated by two — instead of one referred by Kane — research strategies: audio-antropological and onto-aesthetical. By focusing on the latter, where the works by Christoph Cox and Salomé Voegelin are situated, I want to propose a different, affective-materialistic approach to sound studies, based not on the opposition between signification and sound/vibration, but on the relationship between the Deleuzoguattarian machinic concepts and the musical avant-garde. Referring to excerpts from articles and manifestos by Luigi Russolo, Edgar Varèse, Pierre Schaeffer and Pauline Oliveros, I show that the machinic sound imagination once accompanied the historical avantgarde and neo-avant-garde movements. It is the key to break with the anti-post-structural approach in sound studies in favor of a more relational perspective. This perspective, within the onesthetic paradigm, would allow for the interpretation of sound machinery as elements of the machine system (aesthetic, social, cultural) in which sound operates.

Źródło:

Zagadnienia Rodzajów Literackich; 2020, 63, 4; 27-39
0084-4446

Pojawia się w:

Zagadnienia Rodzajów Literackich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Przykłady przetwarzania dźwięku w środowisku VisSim
Examples of sound processing in the VisSim environment

Autorzy:

Noga, K. M.

Powiązania:

https://bibliotekanauki.pl/articles/268490.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Elektrotechniki i Automatyki

Tematy:

dźwięk
obróbka dźwięku
efekty brzmieniowe
sound
processing of sound
sound effect

Opis:

W artykule zostały przedstawione zagadnienia, omawiane na wykładzie z Cyfrowego Przetwarzania Sygnałów, z zakresu tworzenia i obróbki dźwięku, ze szczególnym uwzględnieniem symulacji efektów brzmieniowych. Przykładowe wirtualne układy zostały zbudowane w środowisku VisSim.
The possibilities of creating and processing of sound are presented in environment VisSim. The special attention is paid to the simulation of sound effects. The author presents a number of virtual circuits which allow to easily to explore the reverberation, ping-pong, phasing and echo effects, the equalizer and brainwave generator.

Źródło:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2017, 52; 99-104
1425-5766
2353-1290

Pojawia się w:

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Sound Scattering by an Elastic Spherical Shell and its Cancellation using a Multi-pole Approach

Autorzy:

Avital, E. J.
Bholah, N. D.
Giovanelli, G. C.
Miloh, T.

Powiązania:

https://bibliotekanauki.pl/articles/177764.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound scattering
structural dynamics
sound cancellation

Opis:

The scattering and transmission of sound by an elastic spherical shell is considered when it is subject to an incoming monochromatic planar wave. It is aimed to cancel the sound scattering using combinations of multi-pole sources located at the centre of a shell filled with compressible fluid. Assuming linear acoustics and structural dynamics, exact solutions are derived for total elimination of the sound scattering for three cases: a free-space, near a hard ground or near a free-surface, where in the last two cases it is assumed that the incoming wave propagates normal to the interface to maximize sound reflection back unto the source of the incoming wave. An elastic spherical shell of 1 m radius embedded in water and filled with air or oil is analysed to show the dominance of low-mode numbers for frequencies of less than 10 kHz and thus demonstrate the ability of this approach to damp acoustic scattering by means of low-order multi-poles inside the shell. Contour and mode distribution plots are also given and analysed.

Źródło:

Archives of Acoustics; 2017, 42, 4; 697-705
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

The Use of Combinatorial Methods for Sound Scanning of Objects

Autorzy:

Tsmot, I.
Riznyk, O.
Rabyk, V.

Powiązania:

https://bibliotekanauki.pl/articles/411064.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

ideal ring bundle
non-uniform structure
sound diagnostic
sound generator
sound scanning

Opis:

In article considers application of combinatorial methods for research of sound images scan by the medium of integer sequences – ideal ring bundles as comfortable mathematical models for synthesis and optimization of systems with non-uniform structure. By using combinatorial approaches quality of methods based on the passage of sound signals through the tissues can be significantly improved. Studies show that the use of integer sequences based on the ideal ring bundles in information conversion tasks ensures simplicity of hardware application.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2018, 7, 3; 59-62
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Noise Problem Indicated in Computer Sound Cards Used as Hi-Fi Recording Devices

Autorzy:

Matusiak, M.

Powiązania:

https://bibliotekanauki.pl/articles/108720.pdf

Data publikacji:

2010

Wydawca:

Społeczna Akademia Nauk w Łodzi

Tematy:

computer sound card
electric noise
sound card DSP
sound card noise

Opis:

A sound reception is one of important human perceptions and a contact with the surrounded world. Now computer devices are the main equipment to almost perfectly record and playback a wide range of sounds. Music or sound cards play the central role in this process. The Author has tested several cards concentrating the attention specially on their external versions but internal versions were also investigated for comparison. Usually specially constructed external sound cards are better than much compromised internal versions built directly other electronic circuits on the computer mainboard. It was proved during experiments measuring noise parameters – not always. A simplicity of the construction and other digital circuits closeness create difficult conditions for a noiseless action but in a popular class equipment only. Three external cards, one of PCI interfaces E-MU - 0404 for studio recording and two of USB interface, potentially worse designed by Creative Labs - Sound Blaster Connect and by Lexicon - Alpha. All Hi-Fidelity requirements are performed by each card but noise levels are different. Conclusions are shortly presented here: 1. Built-in sound cards, specialized for Hi-Fi recording are better with noise parameters than external USB devices 2. The newer built-in card (Dell Studio laptop) is only a little bit worse than special professional card by Creative Professional (E-MU 0404) 3. USB cards include additional preamps (very useful) but present in noise charts ad-ditional interferences (peaks) and its noises are a few dB bigger 4. Newer USB cards (Lexicon Alpha) are much better than older (Sound Blaster Connect). The noise difference is up to 10 dB (abt. 3 times) Results are clearly shown using tables, charts and mathematical formulas derived from own experiments.

Źródło:

Journal of Applied Computer Science Methods; 2010, 2 No. 2; 191-199
1689-9636

Pojawia się w:

Journal of Applied Computer Science Methods

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Kultura dźwięku w ośrodku „Brama Grodzka – teatr NN”
The culture of sound in the "Grodzka gate – NN theatre" centre

Autorzy:

Skrzypek, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/87692.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

kultura dźwięku
dźwięk
culture of sound
sound

Opis:

This essey presents the experience and reflection of a cultural insitution on the values of soundscape and methods of making contemporary people more sensitive to it. The aim of the text is to share this experience with scholars and scientists in order to work together on the quality of sonic environment more effectively. The author criticizes the most popular and simplest methods of measuring noise by electronic instruments and reducing it by physical separation of citizens from its sources because they do not reduce noise emission and introduce additional barriers into urban landscape. From the prespective of the Forum for Space Culture (one of the Centre's activities) better methods of fighting annoying souds consist in better city planning and valuating soundscape in relation to its significance in local context. The second part of the essey presents the development of sensitivity to soundscape in the Centre. The first source of interest in this medium was theatre as the kind art in which sound plays a unique role and requires thorough treatment. The second source was the Grodzka Gate whose history lead the founders of the Centre to exploring the local past by recording Oral History. The combination of these two inspirations lead to a series of projects and public events such: publishment of a CD with Oral History about Lublin Jews, sonic environments of exhibitions, hearings of radio reportages and "myteries" – open space events offering participants to experience sounds connected with local cultural heritage. A unique project broadening sensitivity to soundscape is a project The Invisible Map of Wrocław (printed in Polish, German and English) presented by its author Maciej Buczyński during the meeting of the Forum for Space Culture at the conference. It is a guide to Wrocław, created by people who have never seen the city in which they live. The idea behind this project was to visit and document places which have a special meaning to blind people in order to get closer to them and learn how they perceive the world. The resulting catalogue of 31 places portrayed through photography, description and sounds.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 11; 320-326
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Thinking Through New Methodologies. Sounding Out the City With Teenagers

Autorzy:

O’Keeffe, Linda

Powiązania:

https://bibliotekanauki.pl/articles/2107030.pdf

Data publikacji:

2021-12-10

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

New Methodologies
Sound
Sound Mapping
Soundwalks
Soundscape

Opis:

This paper explores the place for sound within social theory, more specifically, how sound as a subject can be interpreted methodologically. The paper examines the various methods implemented within a Ph.D. research project. The research adopted a participatory approach, examining the missing voices in the post design of place. In this way, the research focused on those groups often excluded in the design of urban space, teenagers. The methods included participant documented soundwalking, sound mapping, focus groups, and ethnographic soundwalks. This paper argues that a closer attention to sound, when examining the urban area, will help shape one’s understanding of the everyday. Methods that explore sound as part of the makeup of social life, either as place building or space making, whether they are politically intentional or historically relevant, need to be advanced.

Źródło:

Qualitative Sociology Review; 2015, 11, 1; 6-32
1733-8077

Pojawia się w:

Qualitative Sociology Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Study on Sound Transmission across a Floating Floor in a Residential Building by Using SEA

Autorzy:

Huang, Xianfeng
Lu, Yimin
Qu, Chen
Zhu, Chenhui

Powiązania:

https://bibliotekanauki.pl/articles/1953500.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

sound transmission
floating floor
impact noise
sound insulation

Opis:

For the purpose of reducing the impact noise transmission across floating floors in residential buildings, two main sound transmission paths in the floating floor structure are considered: the stud path and the cavity path. The sound transmission of each path is analysed separately: the sound transmission through the cavity and the stud are predicted by statistical energy analysis (SEA). Then, the sound insulation prediction model of the floating floor is established. There is reasonable agreement between the theoretical prediction and measurement, and the results show that a resilient layer with low stiffness can attenuate the sound bridge effect, resulting in higher impact noise insulation. Then, the influences of the floor covering, the resilient layer and the floor plate on the impact sound insulation are investigated to achieve the optimised structure of the floating floor based on the sound insulation.

Źródło:

Archives of Acoustics; 2021, 46, 1; 183-194
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Understanding Auditory Space in Digital Games for Visually Impaired People

Autorzy:

Farkaš, Tomáš

Powiązania:

https://bibliotekanauki.pl/articles/41317521.pdf

Data publikacji:

2024

Wydawca:

Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie

Tematy:

ambisonic sound
attenuation
audio games
auditory dimensions
auditory space
binaural sound
digital games
sound
sound design
visually impaired

Opis:

The article seeks to establish a foundational framework for comprehending crucial definitions and concepts related to auditory space in digital gaming, particularly focusing on audio games designed for visually impaired individuals (VI), often devoid of graphical interfaces. While existing studies often emphasize players’ interactions with interfaces and the acquisition of real-life skills, this text explores audio games through the lens of entertainment and immersion. Numerous studies indicate a demand among visually impaired players for more intricate and challenging games, incorporating elements usually used in standard digital gaming experiences. By combining definitions from both audio and traditional digital games, this article broadens the scope of sound design considerations, encompassing various aspects and classifications. It presents several auditory dimensions, consolidating them into a comprehensive dimension called attenuation, putting their roles within a game’s context. The author is a sound designer currently working on an audio game; therefore, many of the presented definitions are also a guide that will represent some of his own considerations while working on this game. These include not only the use of binaural or ambisonic sound but also understanding the ways and means of how to work with (3D) space in the context of audio and its possible functions.

Źródło:

Acta Ludologica; 2024, 7, 1; 136-150
2585-8599

Pojawia się w:

Acta Ludologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

A Revised Sound Energy Theory Based on a New Formula for the Reverberation Radius in Rooms with Non-Diffuse Sound Field

Autorzy:

Arau-Puchades, H.
Berardi, U.

Powiązania:

https://bibliotekanauki.pl/articles/177958.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

reverberation radius
critical distance
non-diffuse sound field
sound energy
revised sound decay theory

Opis:

This paper discusses the concept of the reverberation radius, also known as critical distance, in rooms with non-uniformly distributed sound absorption. The reverberation radius is the distance from a sound source at which the direct sound level equals the reflected sound level. The currently used formulas to calculate the reverberation radius have been derived by the classic theories of Sabine or Eyring. However, these theories are only valid in perfectly diffused sound fields; thus, only when the energy density is constant throughout a room. Nevertheless, the generally used formulas for the reverberation radius have been used in any circumstance. Starting from theories for determining the reverberation time in non-diffuse sound fields, this paper firstly proposes a new formula to calculate the reverberation radius in rooms with non-uniformly distributed sound absorption. Then, a comparison between the classic formulas and the new one is performed in some rectangular rooms with non-uniformly distributed sound absorption. Finally, this paper introduces a new interpretation of the reverberation radius in non-diffuse sound fields. According to this interpretation, the time corresponding to the sound to travel a reverberation radius should be assumed as the lower limit of integration of the diffuse sound energy.

Źródło:

Archives of Acoustics; 2015, 40, 1; 33-40
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

An Automatic Synthesis of Musical Phrases from Multi-Pitch Samples

Autorzy:

Pluta, M.
Spalek, L. J.
Delekta, R. J.

Powiązania:

https://bibliotekanauki.pl/articles/177577.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound synthesis
synthesis methods
sampling
Concatenative Sound Synthesis

Opis:

Sound synthesizers are a natural element of a musician’s toolset. In music arrangement, samplers can often produce satisfactory results, but it requires a combination of manual and automatic methods that may be arduous at times. Concatenative Sound Synthesis reproduces many of natural performance- and expression-related nuances but at a cost of high demand for processing power. Here, another method of musical phrase synthesis aimed at music arrangement is presented that addresses these and other related issues. Contrary to common practice, we propose to record and utilize sound samples containing not one, but short sequences of pitches. In effect, natural pitch transitions are preserved and phrases appear to be much smoother, despite using very limited set of performance rules. The proof-of-concept implementation of the proposed method is discussed in detail along with attempts at optimizing the final sound effects, based on auditory tests. The limitations and future applications of the synthesizer are also discussed.

Źródło:

Archives of Acoustics; 2017, 42, 2; 235-247
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Experimental Acoustic Flow Analysis Inside a Section of an Acoustic Waveguide

Autorzy:

Weyna, S.
Mickiewicz, W.
Pyła, M.
Jabłoński, M.

Powiązania:

https://bibliotekanauki.pl/articles/178109.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound intensity
laser anemometry
acoustics flow
sound visualization

Opis:

Noise propagation within ducts is of practical concern in many areas of industrial processes where a fluid has to be transported in piping systems. The paper presents experimental data and visualization of flow in the vicinity of an abrupt change in cross-section of a circular duct and on obstacles inside where the acoustic wave generates nonlinear separated flow and vortex fields. For noise produced by flow wave of low Mach number, laminar and turbulent flows are studied us- ing experimental sound intensity (SI) and laser particle image velocimetry (PIV) technique adopted to acoustics (A-PIV). The emphasis is put on the development and application of these methods for better understanding of noise generation inside the acoustic ducts with different cross-sections. The intensity distribution inside duct is produced by the action of the sum of modal pressures on the sum of modal particle velocities. However, acoustic field is extremely complicated because pressures in non-propagating (cut-off) modes cooperate with particle velocities in propagating modes, and vice versa. The discrete frequency sound is strongly influenced by the transmission of higher order modes in the duct. By under- standing the mechanism of energy in the sound channels and pipes we can find the best solution to noise abatement technology. In the paper, numerous methods of visualization illustrate the vortex flow as an acoustic velocity or sound intensity stream which can be presented graphically. Diffraction and scattering phenomena occurring inside and around the open-end of the acoustic duct are shown.

Źródło:

Archives of Acoustics; 2013, 38, 2; 211-216
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Dźwięk w naszych domach. O akustycznych strategiach marketingowych marki IKEA
Sounds of our homes. Acoustic marketing strategies of IKEA

Autorzy:

Guzy, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/1359022.pdf

Data publikacji:

2021-06

Wydawca:

Instytut im. Jerzego Grotowskiego we Wrocławiu

Tematy:

sound studies
indoor soundscape
sound design
IKEA
marketing

Opis:

The article aims to analyse a sonic turn in IKEA marketing practices that can be observed since 2017. The selection of advertisements that are presented in the paper is studied from two perspectives. Firstly, as a capitalist strategy of producing a demand for a certain product allowing to reperform acoustic harmony that is inherently connected to the notion of a home in western culture. Secondly, in quite the opposite way, as a possible aesthetic impulse capable of changing the consumers’ perception of indoor soundscapes. The frame for this research is mainly Brandon LaBelle’s sound studies theory and Chantal Mouffe’s political theory.

Źródło:

Didaskalia. Gazeta Teatralna; 2021, 163/164; 163-192
2720-0043

Pojawia się w:

Didaskalia. Gazeta Teatralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

A System for Acoustic Field Measurement Employing Cartesian Robot

Autorzy:

Szczodrak, M.
Kurowski, A.
Kotus, J.
Czyżewski, A.
Kostek, B.

Powiązania:

https://bibliotekanauki.pl/articles/221435.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cartesian robot
sound intensity
sound field
anechoic chamber

Opis:

A system setup for measurements of acoustic field, together with the results of 3D visualisations of acoustic energy flow are presented in the paper. Spatial sampling of the field is performed by a Cartesian robot. Automatization of the measurement process is achieved with the use of a specialized control system. The method is based on measuring the sound pressure (scalar) and particle velocity(vector) quantities. The aim of the system is to collect data with a high precision and repeatability. The system is employed for measurements of acoustic energy flow in the proximity of an artificial head in an anechoic chamber. In the measurement setup an algorithm for generation of the probe movement path is included. The algorithm finds the optimum path of the robot movement, taking into account a given 3D object shape present in the measurement space. The results are presented for two cases, first without any obstacle and the other - with an artificial head in the sound field.

Źródło:

Metrology and Measurement Systems; 2016, 23, 3; 333-343
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Effect of Urethane Foam Cushioning on Structure-Borne Sound Transfer by a Slab with Panel Flooring

Autorzy:

Mu, R.
Toyoda, M.
Takahashi, D.

Powiązania:

https://bibliotekanauki.pl/articles/176817.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

urethane foam
direct pasted flooring
floor impact sound
sound pressure level
sound insulation performance

Opis:

Urethane foam mattresses are commonly used as cushioning when placing panel flooring on the floor slab of a building. Urethane foam consists of elastic fibres with pores. Both elements can affect the performance of the insulation against impact sounds. However, these effects have not yet been detailed, and they may change if the material properties or constitution of the fibres and pores in the cushioning change. In this paper, we propose an analytical model for use in evaluating the performance of insulation against floor impact sound. This model was used to examine the contribution of the pores versus the elastic fibres to wave transmissions from the flooring surface to the slab. The results reveal that the constitution of the foam (either open or closed cells of pores) and the thickness and hardness of the cushion layer strongly affect the sound insulation performance of the floor.

Źródło:

Archives of Acoustics; 2016, 41, 1; 99-106
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Niewizualne przeżywanie krajobrazu – rola dźwięków naturalnych i antropogenicznych
Non-visual experience of landscape role of natural and human-generated sounds

Autorzy:

Piechota, Stanisław

Powiązania:

https://bibliotekanauki.pl/articles/87470.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

krajobraz
rola dźwięków
dźwięk
landscape
role of sound
sound

Opis:

W dotychczasowej literaturze najczęściej podejmowano badania atrakcyjności wizualnej krajobrazu, uznając ją za niezwykle ważną (Ulrich, 1977) i wpływającą na podejmowanie w krajobrazie aktywności turystyczno-rekreacyjnej (Kowalczyk, 1992). Zagadnienia dźwięku w środowisku są rzadko studiowane – w porównaniu z szeroko zakrojonymi badaniami, poświęconymi fizycznym aspektom dźwięku, takim jak amplituda, czy związane z dźwiękiem problemy psycho-socjologiczne. Estetyczne i komunikacyjne własności dźwięku są raczej lekceważone. Odgłosy płynące ze środowiska, odbierane poprzez zmysły i przetworzone, wpływają na świadomość turysty i w konsekwencji – na jego działanie (ryc.1). Informacje odbierane z krajobrazu warunkują nasze istnienie. Człowiek jest odbiorcą informacji i jej wytwórcą – jest „autonomiczną kroplą” oceanu informacji, a od jakości każdej kropli zależy jakość całości. Krajobraz dźwiękowy jest indywidualny dla każdego regionu, jest częścią „ducha miejsca”. Przemiany elementów krajobrazu dźwiękowego są ważnym wskaźnikiem przekształceń krajobrazu (Bernat, 2001). Zastosowana przez autora metoda badawcza pokazała szczególną rolę dźwięków naturalnych i antropogenicznych oraz ich przestrzenny i ekologiczny wpływ na środowisko, w którym dany dźwięk jest emitowany. Wyniki badań udowodniły wpływ dźwięku na ocenę krajobrazu wizualnego i interakcje obu tych aspektów. Będąc ważnymi składnikami krajobrazu, muszą one być postrzegane przez człowieka jako jedność, by możliwe było stworzenie pełnej informacji o środowisku.
In contemporary literature the research, which was most often carried out, was devoted to the visual attractiveness of the landscape due to its significant role (Ulrich, 1977)in influencing the tourist recreation activity within the landscape (Kowalczyk, 1992). However, the issue of sound is rarely studied, compared to wide research devoted to physical aspects of the sound, such as the amplitude, or the psychosociological problems connected with sound. The esthetic and communicative qualities of sound are rather neglected. In geographical, foreign literature (e.g. Porterous et al., 1985) one can come across the notion of “soundscape” which was introduced by Schafer (1976). His notion highlights how wide the information hidden in sounds can be. The audio landscape is an individual feature of every region; it is a part of the so-called “genius loci”. The changes in elements of the audio landscape are an important indicator of landscape transformation (Bernat, 2001). The research method was based on the evaluation of different types of landscape by respondents who listened to different sounds. The respondents were shown slides with different types of landscape with sounds played in the background. The sounds included birds songs(sound I) and humen-generated sounds(sound II). The research methods used by the author have shown a significant role of the natural and human-generated sounds as well as their spatial and ecological influence on the natural environment in which the sound is produced. The results of the research have proved that the evaluation of the visual landscape depends on the sound influence. Therefore, the interaction between sound and evaluation, seen as important aspects of the landscape, should be perceived as a unity. In this way full data about the environment can be collected.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 11; 44-53
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Prohibition of the use of sound systems and equipment - article 156 of the Environmental Protection Act

Autorzy:

Niewiarowska, Dorota

Powiązania:

https://bibliotekanauki.pl/articles/1933051.pdf

Data publikacji:

2020-01-20

Wydawca:

Wyższa Szkoła Policji w Szczytnie

Tematy:

environmental protection
noise
noise control
sound equipment
sound systems

Opis:

Article 156 of the Environmental Protection Act prohibits the use of sound systems or equipment in publicly accessible areas of towns, built-up areas and areas intended for recreation and leisure purposes. This prohibition results directly from the law and does not require a separate interpretation, e.g. in the form of an administrative decision. However, its application in practice can be troublesome due to interpretation difficulties caused by the fact that the terms used in the regulation are not directly defined by the applicable law. The author discusses the subjective and objective scope of the prohibition, pointing to examples of judicial decisions, and indicating the consequences of its violation.

Źródło:

Przegląd Policyjny; 2019, 135(3); 219-230
0867-5708

Pojawia się w:

Przegląd Policyjny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Sound Radiation by a Cylindrical Open Cavity with a Surface Source at the Bottom

Autorzy:

Szemela, K.

Powiązania:

https://bibliotekanauki.pl/articles/176682.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

open cylindrical cavity
sound pressure
sound power
continuity conditions

Opis:

The rigorous solution describing the sound radiation by an arbitrary surface source located at the bottom of a cylindrical open cavity embedded in a flat baffle has been obtained. The open cavities of different shapes can be found in some architectural structures as well as are components of sensors, musical instruments and vehicles. The presented formulas have been expressed in the form of Infinite sums. To use them, the infinite sums have to be truncated to the finite number of terms. Therefore, in practice, the results obtain based on the proposed solution are not exact and their accuracy is determined by the truncation error. The use of presented formulas is an alternative method for the finite element method (FEM). However, taking into account that the calculation efficiency of FEM rapidly decrease when a volume of considered region increases, the obtained in this study solution can be more useful in some practical cases. The approximated formula of a high computational efficiency has been presented for the sound pressure in the far field. The sound radiation has been analyzed for a rectangular piston as a sound source. The influence of cavity depth ratio on the radiation efficiency has been investigated. The cases for which the cavity radiation efficiency can be approximately calculated from the formula valid for a baffled sound source have been determined.

Źródło:

Archives of Acoustics; 2018, 43, 1; 49-60
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

The Comprehensive Research of the Road Acoustic Screen with Absorbing and Diffusing Surface

Autorzy:

Kamisiński, T.
Kinasz, R.
Szeląg, A.
Rubacha, J.
Pilch, A.
Flach, A.
Baruch, K.

Powiązania:

https://bibliotekanauki.pl/articles/177952.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

acoustics
mechanical strength
environmental actions
sound reflection
sound diffusion

Opis:

The paper presents the new solution to a road acoustic screen consisting of elements which are highly diffusing and simultaneously resistant to weathering, but also characterised by a sound absorption. There is described the comprehensive research of such the road acoustic screen with absorbing and diffusing surface. The study includes screen’s resistance to wind load and snow removal, impact tests and measurements of some acoustic parameters.

Źródło:

Archives of Acoustics; 2015, 40, 1; 137-144
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

A parametric synthesizer of audio signals on FPGA

Autorzy:

Borko, J.
Dulnik, G.
Grzelka, A.
Łuczak, A.
Paszkowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/114575.pdf

Data publikacji:

2015

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

FPGA
sound synthesis

Opis:

The paper presents a sound synthesizer dedicated to parametric sound compression, but also able to generate any signal in the audible band. The synthesizer is realized on an FPGA platform, and it uses additive sound synthesis. The synthesizer is characterized by a high quality, faithful reproduction of sound and low power consumption.

Źródło:

Measurement Automation Monitoring; 2015, 61, 7; 367-369
2450-2855

Pojawia się w:

Measurement Automation Monitoring

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Metoda Petera Hessa. Studium percepcji dźwięku w profilaktyce i terapii rodzinnej
The Peter Hess Method. Study of sound perception in prophylaxis and family therapy

Autorzy:

Kataryńczuk-Mania, Lidia

Powiązania:

https://bibliotekanauki.pl/articles/2129053.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Wrocławski. Wydział Nauk Historycznych i Pedagogicznych. Instytut Pedagogiki. Zakład Historii Edukacji

Tematy:

dźwięk
terapia dźwiękiem według Petera Hessa
misy dźwiękowe
sound
sound therapy by Peter Hess
sound bowls

Opis:

Wprowadzenie. Mało jeszcze rozpowszechniona w Polsce metoda odprężenia i relaksacji Petera Hessa jest wykorzystywana przez lekarzy, terapeutów, psychoterapeutów, nauczycieli-terapeutów pracujących z osobami z niepełnosprawnością na warsztatach terapii zajęciowej, w ośrodkach pomocy społecznej, hospicjach, szpitalach. Cel. Celem artykułu jest ukazanie wybranych założeń metody Petera Hessa i możliwości jej wykorzystania w profilaktyce i terapii rodzinnej. Materiały i metody. W pracy wykorzystano opis indywidualnych przypadków osób korzystających z terapii rodzinnej w Ośrodku Pomocy Społecznej „Arka” w Zielonej Górze. Wyniki. Z obserwacji wynika, że metoda Petera Hessa stwarza szerokie możliwości profilaktyczno-terapeutyczne w pracy z dorosłymi, z członkami rodzin.
Introduction. The method of relaxation by Peter Hess, not particularly popular in Poland, is used by doctors, therapists, psychotherapists, and teacher-therapists working with people with disabilities in occupational therapy workshops, social welfare centres, hospices, and hospitals. Objective. The aim of the article is to present selected assumptions of the Peter Hess method and the possibilities of its use in prophylaxis and family therapy. Materials and methods. The work uses a description of individual cases of people benefiting from family therapy at the “Arka” Social Welfare Centre in Zielona Góra. Results. The observations show that the Peter Hess method creates wide preventive and therapeutic possibilities in working with adults and family members.

Źródło:

Wychowanie w Rodzinie; 2020, XXIII, (2/2020); 157-166
2082-9019

Pojawia się w:

Wychowanie w Rodzinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Metody badań krajobrazów dźwiękowych
Methods of soundscape study

Autorzy:

Bernat, Sebastian

Powiązania:

https://bibliotekanauki.pl/articles/87746.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

soundscape
sound
sound ecology
krajobraz dźwiękowy
dźwięk
ekologia dźwiękowa

Opis:

The sound is the subject of interest for many various scientific disciplines, i.e. acoustics, cultural anthropology, landscape architecture, ethnology, aesthetics, geography, medicine, musicology, psychology, sociology, and urban planning. Researches and using of sound and music in various aspects have become more popular lately. In many countries there are undertaken studies of soundscape, and despite of their fast development they encounter some difficulties, which are the consequence of interdisciplinary character. The aim of the paper is presenting exemplary research approaches in studies of sound in the landscape at the point of view of geographer or representative of complex discipline concerning the nature and also culture. In the cultural and urban studies there are some sociological methods: semantic differential, mental map, questionnaire, and interviews (oral history). In the landscape ecology studies landscape preferences are analyzed, and estimation of perceptivebehavioral values is prepared. This estimation method points out some preferences and attractiveness of landscape for people, and it can be readable as richness of feelings and diversity of stimuli, for example sound ones. Special attention should be paid on holistic methods, connected with landscape researches within landscape character assessment with identification of special landscape features, and description of type and conditions of introduced changes and investment development. Sound effects landscape, it forms landscape character.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 11; 122-133
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Eksperymentalna platforma rekonfigurowalna w zastosowaniach syntezy i przetwarzania dźwięku
An experimental reconfigurable platform for sound processing applications

Autorzy:

Łazoryszczak, M.

Powiązania:

https://bibliotekanauki.pl/articles/153278.pdf

Data publikacji:

2014

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

synteza dźwięku
efekt dźwiękowy
FPGA
sound synthesis
sound effect

Opis:

W artykule przedstawiono koncepcję platformy rekonfigurowalnej, której głównym zastosowaniem jest testowanie sprzętowych algorytmów syntezy dźwięku oraz implementacja efektów dźwiękowych. Istotnym elementem systemu jest także wykorzystanie sieci opartej na technologii Ethernet do transmisji zarówno sygnałów sterujących np. MIDI jak i dźwięku cyfrowego. Ponadto istotną cechą proponowanej platformy jest modularność w zakresie np. liczby obsługiwanych kanałów dźwiękowych jak i wewnętrznych torów przetwarzających.
In this paper, the outline of an experimental platform for sound synthesis and sound processing is presented. The main idea of a reconfigurable synthesizer is to integrate different blocks and functions typically present in several devices. Most important design assumptions are hardware FPGA plug-ins, flexible configuration of analog inputs, sophisticated graphical user interface. One of the goals of this system is to build a system for testing synthesis and sound effects algorithms. Hardware FPGA “inserts” allow easy replacement of the processing method on the hardware level. Configurable input analog modules provide a flexible way for adjusting external channels on demand. A distributed, intelligent graphical user interface makes adjusting the parameters of sound by several performers at the same time possible. Such a feature is very useful especially by live performances. Another important part of the proposed solution is communication between the system modules and external devices. Besides a separate MIDI interface intended for data transfer including notes and control information, the wired and wireless standards for MIDI over Ethernet, digital sound, control data etc. are necessary. Selected aspects regarding implementation of a part of the reconfigurable synthesizer, including simple waveform synthesis and envelope modifier, are presented in the paper. Standard development boards were used as a test environment. The implemented blocks are the basis for future development of the system.

Źródło:

Pomiary Automatyka Kontrola; 2014, R. 60, nr 7, 7; 420-422
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Prediction of Sound Insulation of Sandwich Partition Panels by Means of Artificial Neural Networks

Autorzy:

Garg, N.
Dhruw, S.
Gandhi, L.

Powiązania:

https://bibliotekanauki.pl/articles/176461.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

weighted sound reduction index
Rw
Sound Transmission Class
STC

Opis:

The paper presents the application of Artificial Neural Networks (ANN) in predicting sound insulation through multi-layered sandwich gypsum partition panels. The objective of the work is to develop an Artificial Neural Network (ANN) model to estimate the R_w and STC value of sandwich gypsum constructions. The experimental results reported by National Research Council, Canada for Gypsum board walls (Halliwell et al., 1998) were utilized to develop the model. A multilayer feed-forward approach comprising of 13 input parameters was developed for predicting the R_w and STC value of sandwich gypsum constructions. The Levenberg-Marquardt optimization technique has been used to update the weights in back-propagation algorithm. The presented approach could be very useful for design and optimization of acoustic performance of new sandwich partition panels providing higher sound insulation. The developed ANN model shows a prediction error of ± 3 dB or points with a confidence level higher than 95%.

Źródło:

Archives of Acoustics; 2017, 42, 4; 643-651
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Facilities for Music Education and Their Acoustical Design

Autorzy:

Koskinen, H.
Toppila, E.
Olkinuora, P.

Powiązania:

https://bibliotekanauki.pl/articles/89954.pdf

Data publikacji:

2010

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

music
sound exposure
room acoustics
reverberation time
sound absorption

Opis:

Good rehearsal facilities for musicians are essential. Directive 2003/10/EC necessitates that musicians are protected from noise exposure. A code of conduct gives the guidelines how this should be done. This study examines room acoustics recommendations provided by the Finnish code of conduct, and discusses whether they are adequate. Small teaching facilities were measured after renovation and compared to earlier measurements. Teachers’ opinions were inquired about the facilities before and after. The renovation did not decrease the noise exposure of the teachers. However, the majority preferred the facilities after the renovation. The Finnish code of conduct is not sufficient for facilities where loud instruments are played, or band practise. Good facilities can be designed but they must be specified at the designing stage for their intended use.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2010, 16, 1; 93-104
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Sound Art: materialność dźwięku
Sound Art: Materiality of Sound

Autorzy:

Sitko, Agata

Powiązania:

https://bibliotekanauki.pl/articles/467538.pdf

Data publikacji:

2016

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

materialność
dźwięk
sound art
performatyka
materiality
sound
performance studies

Opis:

Sound art is a term used to classify works which incorporate sound as the main artistic means of communication with the audience. If we look at the presence of sound in art from a historical viewpoint, our attention can be drawn by Cabaret Voltaire and the performances of Dadaist on its stage. Sound became also an element of performances, and constituted an integral part of many of them. However, it only accompanied the artworks and was not an independent object of art. The text focuses on materiality which is an integral part of Sergei Tcherepin’s sound artworks. In his artworks, a material object and sound constitute a specific unity.
Sound art to pojęcie określające prace, w których dźwięk jest dominującym środkiem artystycznym. Z historycznego punktu widzenia, naszą uwagę może przyciągnąć Cabaret Voltaire i występy dadaistów na jego scenie. Dźwięk stał się też elementem performansów i stanowił integralną część wielu z nich. Jednakże stanowił element „towarzyszący”, a nie był samodzielnym „obiektem” sztuki. Artykuł skupia się na materialnym elemencie towarzyszącym pracom Sergeia Tcherepina, amerykańskiego artysty, którego twórczość zaliczana jest do sound art. W jego pracach materialny obiekt i dźwięk stanowią swoistą jedność.

Źródło:

ER(R)GO: Teoria – Literatura – Kultura; 2016, 33
1508-6305
2544-3186

Pojawia się w:

ER(R)GO: Teoria – Literatura – Kultura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Method for Calculating the Sound Absorption Coefficient for a Variable Range of Incidence Angles

Autorzy:

Yori, Alfio

Powiązania:

https://bibliotekanauki.pl/articles/177245.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

sound absorbing material
sound absorption coefficient
circular wave incidence

Opis:

The theoretical estimation of sound absorption coefficient of a surface may give very different results. This will depend on the type of sound field assumed in the theoretical model used for the estimation of its sound absorption coefficient. Absorption coefficients for normal and diffuse sound fields are widely known, although they may be far from the absorption values given by an absorbing material when it is finally installed inside a room or enclosed space, where a sound field closer to a spherical wavefront is more likely to be found. This work presents a theoretical study, which is addressed at obtaining a mathematical expression to calculate the sound absorption coefficient for a variable range of incidence angles, called α_s. The presented method uses a circular sound field incidence as an approximation to a spherical incidence. The estimation of this coefficient α_s is based on obtaining the incident and reflected sound fields for a surface located facing a lineal source. The advantage of this calculation method over others lies on its capability to give results for circular, normal and random wave incidence depending on the range of incidence angles considered in the calculation.

Źródło:

Archives of Acoustics; 2020, 45, 1; 67-75
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Study on Noise Attenuation Characteristics of Hydrofoil with Specific Cavitation Number

Autorzy:

Xiaohui, He
Zhongle, Liu
Chao, Yang
Zhiyong, Yuan

Powiązania:

https://bibliotekanauki.pl/articles/31339799.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

sound pressure spectrum
noise
sound power spectrum
numerical prediction

Opis:

In this study, the modified Sauer cavitation model and Kirchhoff-Ffowcs Williams and Hawkings (K-FWH) acoustic model were adopted to numerically simulate the unsteady cavitation flow field and the noise of a three-dimensional NACA66 hydrofoil at a constant cavitation number. The aim of the study is to conduct and analyze the noise performance of a hydrofoil and also determine the characteristics of the sound pressure spectrum, sound power spectrum, and noise changes at different monitoring points. The noise change, sound pressure spectrum, and power spectrum characteristics were estimated at different monitoring points, such as the suction side, pressure side, and tail of the hydrofoil. The noise characteristics and change law of the NACA66 hydrofoil under a constant cavitation number are presented. The results show that hydrofoil cavitation takes on a certain degree of pulsation and periodicity. Under the condition of a constant cavitation number, as the attack angle increases, the cavitation area of the hydrofoil becomes longer and thicker, and the initial position of cavitation moves forward. When the inflow velocity increases, the cavitation noise and the cavitation area change more drastically and have a superposition tendency toward the downstream. The novelty is that the study presents important calculations and analyses regarding the noise performance of a hydrofoil, characteristics of the sound pressure spectrum, and sound power spectrum and noise changes at different monitoring points. The article may be useful for specialists in the field of engineering and physics.

Źródło:

Archives of Acoustics; 2023, 48, 3; 359-372
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Objective and subjective evaluation of musical and speech recordings transmitted by DAB+ system

Autorzy:

Dobrucki, Andrzej
Brachmański, Stefan
Kin, Maurycy

Powiązania:

https://bibliotekanauki.pl/articles/127694.pdf

Data publikacji:

2019

Wydawca:

Politechnika Poznańska. Instytut Mechaniki Stosowanej

Tematy:

sound quality
broadcasting
sound attributes
jakość dźwięku
transmisja
atrybuty dźwięku

Opis:

The results of research on the sound quality of various kinds of music as well as speech signals transmitted via Digital Audio Broadcasting Plus system are presented. The results showed that bitrate values significantly influence the results of quality assessment, i.e. the overall audio quality as well as a timbre are dependent on the bitrate. The additional conclusion is that the CCR method is more accurate for sound assessment for higher bitrate values and this fact has been verified by standard deviation values of obtained results. The speech signals were additionally examined with PESQ method. The results have shown that the assumed quality of 4 MOS for speech could be achieved at 48 kbps. This fact was confirmed by both: subjective and objective research.

Źródło:

Vibrations in Physical Systems; 2019, 30, 1; 1-8
0860-6897

Pojawia się w:

Vibrations in Physical Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Improving Sound Transmission Through Triple-Panel Structure Using Porous Material and Sonic Crystal

Autorzy:

Kim, Myong-Jin

Powiązania:

https://bibliotekanauki.pl/articles/177186.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

sound transmission loss
sonic crystal
triple-panel structure
sound insulation

Opis:

Main aim of this study is to combine the characteristics of the sonic crystal (SC) with acoustic panels and porous materials to improve the sound transmission loss (STL) through the triple-panel structure. SCs cause a bandgap centered around a certain frequency (Bragg’s frequency) due to generation of destructive interference. Initially, an analytical method is developed that extends the previous theory of double-panel structure to predict STL through a triple-panel structure. Finite element (FE) simulations are performer to obtain the STL through the triple-panel, which are validated with the analytical predictions. Various configurations are analyzed using the FE method based on the method of inserting the porous material and SCs between the panels to address the combined effect. STL through the triple-panel structure is compared with that through the double-panel structure having the same total weight and total thickness. It is found that the combined structure of the triple panel and the SC with glass wool as filler gives the best soundproof performance for the same external dimensions. For narrow air gaps, filing with glass wool is more advantageous than inserting one row of SC. In addition, the triple panel combined with a SC has better soundproofing than the two-panel counterparts.

Źródło:

Archives of Acoustics; 2019, 44, 3; 533-541
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Acoustic Analysis Using Sound Level Meter to Determine the Period of Usage of the Spindle Bearing of a Radial Drilling Machine

Autorzy:

Charles, S.
Vijaya, Joslin D.

Powiązania:

https://bibliotekanauki.pl/articles/176769.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

acoustical condition monitoring
radial drilling machine
spindle bearing
sound level meter
sound pressure level
sound muting transducer

Opis:

The condition monitoring techniques like acoustic emission, vibration analysis, and infrared thermography, used for the failure diagnosis of bearings, require longer processing time, as they have to per form acoustical measurement followed by signal processing and further analysis using special software. However, for any bearing, its period of usage can be easily determined within an hour, by measuring the bearing sound, using sound level meter (SLM). In this paper the acoustical analysis of the spindle Bering of a radial drilling machine was performed using SLM, by measuring the sound pressure level of the bearing in decibels, for different frequencies, while muting all the other noises. Then using an experimental set up, two database readings were taken, one for new bearing and the other for completely damaged bearing, both are SKF6207, which itself is the spindle bearing. From these three sets of sound pressure level readings, the period of usage of the spindle bearing, was calculated using an interpolation equation, by substituting the life of the bearing from the manufacturer’s catalogue. Therefore, for any machine with a SKF6207 bearing, its usage time can be estimated using the database readings and one measurement on that machine, all with the same speed.

Źródło:

Archives of Acoustics; 2019, 44, 3; 505-510
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

The Effect of Plate Discretization on Accuracy of the Sound Radiation Efficiency Measurements

Autorzy:

Kolber, K.
Snakowska, A.
Kozupa, M.

Powiązania:

https://bibliotekanauki.pl/articles/177333.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound radiation efficiency
sound radiation from plates
discrete calculation method

Opis:

This paper deals with the problem of the effect of discretization level and certain other parameters characterizing the measurement setup on accuracy of the process of determination of the sound radiation efficiency by means of the Discrete Calculation Method (DCM) described by Hashimoto (2001). The idea behind DCM consists in virtual division of an examined sound radiating structure into rectangular elements each of which is further assumed to contribute to the total radiation effect in the same way as a rigid circular piston having the surface area equal to this of the corresponding virtual element and vibrating in an infinite rigid baffle. The advantage of the method over conventional sound radiation efficiency measurement techniques consists in the fact that instead of acoustic pressure values, source (plate) vibration velocity amplitude values are measured in a selected number of regularly distributed points. In many cases, this allows to determine the sound radiation efficiency with sufficient accuracy, especially for the low frequency regime. The key part of the paper is an analysis of the effect of discretization level (i.e. the choice of the number of points at which vibration amplitude measurements are to be taken with the use of accelerometers) on results obtained with the use of the method and their accuracy. The problem of determining an optimum level of discretization for given excitation frequency range is a very important issue as the labor intensity (time-consuming aspect) of the method is one of its main flaws. As far as the technical aspect of the method is concerned, two different geometrical configurations of the measurement setup were tested.

Źródło:

Archives of Acoustics; 2014, 39, 4; 511-518
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Multi-Objective Optimization of Acoustical Properties of PU-Bamboo-Chips Foam Composites

Autorzy:

Jiang, Y.
Chen, S.
Wang, D.
Chen, J.

Powiązania:

https://bibliotekanauki.pl/articles/177709.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

vehicle sound package
sound absorption coefficient
transmission loss
Taguchi method

Opis:

In this study, an effective optimization approach was proposed to improve acoustical behaviors of PU foams. The important parameters of PU foams: content of water, silicone oil and catalyst A1 were chosen and their effects on sound absorption coefficient and transmission loss of PU foams were studied by using Taguchi methods. In addition, bamboo chips were incorporated into PU foams as fillers to improve the acoustical properties of PU foams. Four controlled factors: the content of water, silicone oil, catalyst A1 and bamboo chips with three levels for each factor were chosen and Taguchi method based on orthogonal array L₉ (3⁴) was employed to conduct the experiments. Based on the results of Taguchi’s orthogonal array L₉ (3⁴), signal-to noise (S/N) analysis was used and developed to determine an optimal formulation of PU-bamboo-chips foam composites.

Źródło:

Archives of Acoustics; 2017, 42, 4; 707-714
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Estimation of Asymmetry in Head Related Transfer Functions

Autorzy:

Jasiński, Maciej
Żera, Jan

Powiązania:

https://bibliotekanauki.pl/articles/2055229.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

acoustics
sound processing
virtual reality
spatial sound
Head Related Transfer Functions

Opis:

The individual Head-Related Transfer Functions (HRTFs) typically show large left-right ear differences. This work evaluates HRTF left-right differences by means of the rms measure called the Root Mean Square Difference (RMSD). The RMSD was calculated for HRTFs measured with the participation of a group of 15 subjects in our laboratory, for the HRTFs taken from the LISTEN database and for the acoustic manikin. The results showed that the RMSD varies in relation to the frequency and as expected is small for more symmetrical HRTFs at low frequencies (0.3÷1 kHz). For higher frequency bands (1÷5 kHz and above 5 kHz), the left-right differences are higher as an effect of the complex filtering caused by anatomical shape of the head and the pinnae. Results obtained for the subjects and for data taken from the LISTEN database were similar, whereas different for the acoustic manikin. This means that measurements with the use of the manikin cannot be considered as perfect average representation of the results obtained or people. The method and results of this study may be useful in assessing the symmetry of the HRTFs, and further analysis and improvement of how to considered the HRTFs individualization and personalization algorithms.

Źródło:

International Journal of Electronics and Telecommunications; 2022, 68, 2; 193--200
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Method of Testing of Sound Absorption Properties of Materials Intended for Ultrasonic Noise Protection

Autorzy:

Pleban, D.

Powiązania:

https://bibliotekanauki.pl/articles/177443.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

ultrasonic noise
sound absorption coefficient
tone burst technique
sound absorbing material

Opis:

Efficient ultrasonic noise reduction by using enclosures requires the knowledge of absorbing properties of materials in the frequency range above 4 kHz. However, standardized methods enable determination of absorption coefficients of materials in the frequency range up to 4 kHz. For this reason, it is proposed to carry out measurements of the sound absorption properties of materials in the free field by means of a tone-burst technique in the frequency range from 4 kHz to 40 kHz at angles of incidence varying from 0° to 60°. The absorption coefficient of a material is calculated from the reflection coefficient obtained by reflecting a tone-burst from both a perfectly reflecting panel and a combination of this panel and the sample of the tested material. The tests results show that mineral wool and polyurethane open-cell foam possess very good absorbing properties in this frequency range.

Źródło:

Archives of Acoustics; 2013, 38, 2; 191-195
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Urban soundscape preferences in relation to the function of a place: case studies in Warsaw

Autorzy:

Romanowska, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/2138674.pdf

Data publikacji:

2018-09-30

Wydawca:

Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych

Tematy:

Soundscape
sound perception
urban landscape
Warsaw
acoustic environment
urban sound planning

Opis:

The survey interviewed three hundred and nine people in five public places within Warsaw. The aim of the survey was to examine if people's sound preferences are related to a place's function and how these preferences diferentiate. A further aim of this research was to gather users' ideas for making city soundscapes more pleasant. The results showed that people generally prefer natural and human sounds, but do not like mechanical sounds; the importance of specific sounds are diferentiated in relation to the function and history of a place. The main way to make urban places sound better and more appropriate to their function is to eliminate or reduce mechanical sounds (especially trafic), but individual methods depend on local conditions. The second way to make places sound better is to increase natural sounds and to make soundscapes more appropriate to their function - an increase in human sounds (mainly music).

Źródło:

Miscellanea Geographica. Regional Studies on Development; 2018, 22, 4; 237-242
0867-6046
2084-6118

Pojawia się w:

Miscellanea Geographica. Regional Studies on Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Konstrukcja charakterystyk dźwięku "mało wrażliwych" na transformacje nieliniowe

Autorzy:

Ziębakowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/329494.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

dźwięk
wrażenia słuchowe
transformacje nieliniowe
natężenie dźwięku
sound
sound intensity
audition

Opis:

Jedną z trudniejszych do wyjaśnienia własności mechanizmu percepcji dźwięku jest stosunkowo niewielki wpływ zniekształceń nieliniowych dźwięku na uświadamiane przez człowieka wrażenia słuchowe. Wiadomo, że wrażenia słuchowe są silnie powiązane z widmem dźwięku, które z kolei jest bardzo podatne na transformacje nieliniowe. W dodatku zakres natężeń dźwięku odbierany przez człowieka jest znaczny, ponad 100 dB, tak więc duży wpływ będą miały również nieliniowości rzędów większych niż 2. W pracy zaprezentowano konstrukcję charakterystyk "mało wrażliwych" na transformacje nieliniowe, utworzonych na bazie dyskretnego widma dźwięku. Konstrukcja ta ma charakter algebraiczny i wykorzystano w niej w zakresie podstawowym elementy teorii reprezentacji grup skończonych. Pokazano, jak można wyjaśnić niektóre zjawiska psychoakustyczne jak np. zjawisko residuum, które polega na utrzymywaniu się słyszenia tonu podstawowego po jego usunięciu, czy zagadnienie niesłyszenia większości tonów nieliniowych (tzw. kombinacyjnych).

Źródło:

Diagnostyka; 2000, 23; 93-96
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Dźwięk jako walor krajobrazu
Sound as a value of landscape

Autorzy:

Lewandowski, W.
Szumacher, I.

Powiązania:

https://bibliotekanauki.pl/articles/87700.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

dźwięk
krajobraz
sound
landscape

Opis:

The main aim of this paper is typology, valorization and mapping of soundscapes. Identification of sounds in landscape and mapping them can be very useful and practical for tourism, especially for ecotourism. For this reason the map “Attractiveness of landscape units for ecotourism” by S. Kulczyk and W. Lewandowski (2006) was used us a background. The research field was located at Polish uplands, within Niecka Nidziańska Region. Three types of landscape are represented these – the valley bottom landscape of Nida Valley, the loessy landscape within Garb Wodzisławski and chalk-gypsum landscape in Niecka Solecka. The project included two stages. In the first stage the map with potential sounds and their “borders” for each landscape units was done. In the second stage the final verification of this map with students during the summer practice in 2008 was conducted. They were asked to identify sounds in the area and to map them. The results of the project confirmed that sound is a very important part of landscape and it should be taken into account by estimating the value of landscape for ecotourism. Some not attractive units on the map “Attractiveness of landscape units for ecotourism” appeared us an attractive because of their sounds (for instance agriculture fields). Some attractive fields lost their value because of noise from gypsum-mine or the road. Natural and artificial sounds were recognized within the research area. For agriculture landscape of Ponidzie the most characteristic sound is skylark (Alauda arvensis) song. Sounds smoothly change in time and space. Borders delimitated on the basis of visual changes do not exist for them. For this purpose it would be better to speak about sound in landscape than about soundscapes. This kind of research should be continuing by interdisciplinary team including ornithologists.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 11; 54-62
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Autonomous hydroacoustic sound velocity profiler

Autorzy:

Jedel, A.
Marszal, J.
Ostrowski, Z.
Kilian, L.

Powiązania:

https://bibliotekanauki.pl/articles/332093.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

hydroacoustics
sound velocity profiler

Opis:

The paper presents the autonomous hydroacoustic sound velocity profiler collaborating with ordinary PC by small box included interface & battery charger. The measurement and calibration methods and block diagram of the meter are presented as well as principles of operation, data collection, selection and transmission. There are described three versions of this meter - dropped from "normal" ships, installed in the light hull of submarines and casings in the hulls of variable depth sonar antennas.

Źródło:

Hydroacoustics; 2003, 6; 261-266
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Spatial distribution of underwater sound generated by hull of moving ship

Autorzy:

Listewnik, K.

Powiązania:

https://bibliotekanauki.pl/articles/332792.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

underwater sound
ship
acoustics

Opis:

The paper presents the experimental research associated with the spatial distribution of acoustic energy generated by moving ship into the water. The paper present the methodology of evaluations acoustics energy from the mechanisms of ship into the water environment. For that purpose the research of noise spatial distribution over ship's hull were conducted along with the hydroacoustic field. The hull is source of waves of complex surface shape inducing waves of different amplitudes and phases depending on the position of ship's machinery. As a result of the hull vibrations generated wave distribution depending on the primary sources, as the main propulsion units, generators or other mechanisms. This research allowed to determine position of the main noises' sources of acoustics energy of machinery and propulsion system depending on class of ships and to designate spatial distribution of noise generated by hull of moving ship.

Źródło:

Hydroacoustics; 2009, 12; 109-116
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Estimation of sound power level of machine by inverse method

Autorzy:

Piechowicz, Janusz

Powiązania:

https://bibliotekanauki.pl/articles/2146645.pdf

Data publikacji:

2021

Wydawca:

Politechnika Poznańska. Instytut Mechaniki Stosowanej

Tematy:

inverse method
sound power
sound pressure level
sound measurement
metoda odwrotna
moc akustyczna
poziom ciśnienia akustycznego
pomiar dźwięku

Opis:

The paper presents the inverse method to estimate the sound power level of machines operated in industrial environments. Values of the partial sound power sources of machine components could be predicted based on the distribution of sound field parameters measured around the machine. Assigning partial sound power levels of machine components allows for the effective selection of efficient noise protection solutions for this machine. Measurements were carried out in an actual mechanical workshop. The multichannel measurement system for simultaneous recording of sound pressure levels and the angle of phase angle shift was used in measurements. Based on the determined the sound power of partial sources, the A-weighted sound pressure levels at the operator's workplace were determined.

Źródło:

Vibrations in Physical Systems; 2021, 32, 1; art. no. 2021113
0860-6897

Pojawia się w:

Vibrations in Physical Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

„Ku formom życia dźwięku i kulturom słyszenia”

Autorzy:

Łukasiewicz, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/468575.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Wrocławski. Instytut Kulturoznawstwa. Pracownia Badań Pejzażu Dźwiękowego

Tematy:

audiosfera
soundscape
sound studies

Opis:

Kultur. Von den Cultural Studies bis zu den Visual Studies (Bielefeld 2012), a propaedeutic and synthetic book edited by Stephan Moebius, contains a chapter on sound studies, which was written by Holger Schulze. Arguing that no model of a homogeneous science of sound can be maintained, Schulze advocates studies that retain processuality, performativity, heterogeneity and hybridity of the cognitive process. Subsequently, when he was presenting the development of sound studies, he was able to take into account the experiences of the musical avantgarde, the development of theoretical research on sound, and various practical consequences and transformations of ethnomusicology. Schulze devoted the most attention to what it meant, means and will mean to study the world of sound, i.e. the world of sounds and the sounding world.

Źródło:

Audiosfera. Koncepcje – Badania – Praktyki; 2015, 1; 85-90
2450-4467

Pojawia się w:

Audiosfera. Koncepcje – Badania – Praktyki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Definition and Measure of the Sound Quality of the Machine

Autorzy:

Pleban, D.

Powiązania:

https://bibliotekanauki.pl/articles/176874.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound quality
machine
noise

Opis:

The analysis of available literature indicates that tests of products sound quality, which would not involve participation of groups of listeners supposed to evaluate the sounds emitted by these products, are neither carried out in Poland, nor in the world. That results in the fact that the products sound quality is determined on the basis of psychoacoustic information and comprises both objective and subjective factors of sound perception. With reference to those factors and to different life cycles of the machine, an original definition of the “sound quality of the machine” has been developed and presented in this article. The global index of the acoustic quality of the machine, accounting for the relations between the noise level at the workstation and the selected parameters characterising both the machine’s sound activity and the working environment, was adopted as the measure of the sound quality of the machine. The experiments that followed confirmed the appropriateness of the assessment made with the use of the global index of acoustic quality.

Źródło:

Archives of Acoustics; 2014, 39, 1; 17-23
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Rotation motion of particles in sound field

Autorzy:

Didenkulov, I.
Ezersky, A.
Selivanovsky, D.
Chernov, V.

Powiązania:

https://bibliotekanauki.pl/articles/332816.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

rotation motion
sound field

Opis:

It is known that sound field produces longitudinal oscillation motion of medium. If there are floating particles in a medium those particles oscillate together with liquid. In this paper we consider dynamics of floating particles, which have rotational oscillations in acoustic field. This novel phenomena produces additional sound attenuation due to viscous damping. In the present paper this effect is analytically described. The expression for sound attenuation in suspensions of such particles and estimations of the value of the effect are obtained, and possible applications are discussed.

Źródło:

Hydroacoustics; 2003, 6; 167-170
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Preferencje dźwięków w krajobrazie
Sound preferences in landscape

Autorzy:

Kowalczyk, Aleksandra

Powiązania:

https://bibliotekanauki.pl/articles/88008.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

dźwięk
krajobraz
sound
landscape

Opis:

Przedstawione poniżej poglądy na preferencje dźwięków w krajobrazie są wynikiem analizy literatury przedmiotu oraz badań ankietowych percepcji wielozmysłowej krajobrazów mieszkańców Albanii, Australii (Aborygeni), Chin, Hiszpanii, Iranu, USA (Kalifornia), Mongolii, Polski, Rosji (rejon południowego Uralu) oraz Japonii. Liczebność badanych w poszczególnych państwach była rożna (40 do 71 osób), zatem badania te uznać można jedynie za pilotażowe. Ich wyniki są zaledwie prawdopodobieństwem stanu, jednak dowód „katastrofy nieskończonej regresji von Neumanna” wskazuje na to, że zawsze będziemy skazani na niepewność i nieoznaczoność, której kres położyć może dopiero świadomość obserwatora. Celem badań było poznanie wpływu sygnałów dźwiękowych, wytwarzanych przez elementy i zjawiska występujące w rożnych typach krajobrazu (strefach klimatycznych) oraz w rożnych społecznościach kulturowych, na jakość odczuć emocji (stanów psychicznych) pozytywnych bądź negatywnych.
The article comprises an analysis of the results of survey research, which were carried out in selected countries belonging to the moderate area, and concerning preferences of sounds emitted in geographical space and perceived by its inhabitants. All respondents perceived the sounds which were elements of nature as nice, except for unknown sounds and the ones associated with danger. Unpleasant feelings resulted from the sounds made by mechanical devices and dangerous natural phenomena. Very loud conversations and shouts are also unpleasant for people. Preferences of sound signals in geographical space are conditioned by the natural environment, culture and indirectly by political systems.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 11; 36-43
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

On Suitability of Day-Night Average Sound Level Descriptor in Indian Scenario

Autorzy:

Garg, Naveen

Powiązania:

https://bibliotekanauki.pl/articles/177734.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

National Ambient Noise Monitoring Network
NANMN
day equivalent sound level
Lday
night equivalent sound level
Lnight
day-night average sound level
Ldn
day-evening-night average sound level
Lden
equivalent continuous sound level
LAeq,24h

Opis:

The paper analyzes the monthly day equivalent levels, L_day (06-22 h) and night equivalent levels, L_night (22-06 h) values observed in year 2015 and 2016 for the 70 locations whereby continuous noise monitoring is conducted under the National Ambient Noise Monitoring Network (NANMN). The study exclusively analyzes the ambient noise data acquired for 25 locations in commercial zone, 12 in industrial, 16 in residential and 17 in silence zones. The analysis of (L_day – L_night) for 70 locations under observations reveals that 10 dB night time adjustment in day-night average sound level descriptor is not appropriate in such a scenario and as such it is recommended to use day-night average sound level and day-eveningnight average sound level descriptors without any 10 dB night time adjustment or 5 dB evening time adjustments. The analysis and conclusions of the present study shall be very useful for developing single value noise descriptor correlating the noise annoyance and health effects in Indian perspectives.

Źródło:

Archives of Acoustics; 2019, 44, 2; 385-392
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Overview of the experimental determination of acoustic flow on the basis of sound intensity measurements
Przegląd rezultatów badań przepływów akustycznych wykonanych metodą pomiaru rozkładu natężenia dźwięku

Autorzy:

Weyna, S.

Powiązania:

https://bibliotekanauki.pl/articles/368862.pdf

Data publikacji:

2014

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

flow acoustics
sound intensity
sound imaging
przepływy akustyczne
natężenie dźwięku
wizualizacja dźwięku

Opis:

A large variety of CFD/CAA hybrid approaches are commonly used today for aero-acoustic engineering applications using equations and the coupling between source and acoustic propagation region. The coupling is usually made using Lighthill 's acoustic analogies and Kirhchoff's acoustic boundary conditions. This paper intends to give answer how the size and shape of the source may be influence on the accuracy of the different coupling methods and their sensitivity. In this way, some experimental investigation was made using sound intensity measurement technique to the graphic presentation of the spatial distribution of the acoustic power flow over various geometrical shapes of structures located in a three-dimensional space. The results of these studies contribute to the theory of sound and general knowledge about the physics of flow acoustic phenomena, especially in the near acoustic field. As a result of research, the visualization analysis of the sound intensity flux in 3D space is shown as flow wave reactions on the presence of obstacles with different shapes. The results of vector flow fields around a rectangular and circular plate, over the cavity and inside a ducts are shown. The visualization of acoustic power flow in real-life acoustic fields can explain many particular energetic acoustic effects like scattering, vortex flow in shielding area, etc., concerning area where it is difficult to make numerical analysis.
Duża różnorodność hybrydowych zastosowań technik CFD/CAA jest dzisiaj powszechnie używanym narzędziem w inżynierskich zastosowaniach aeroakustycznych wykorzystujących równania sprzęgające źródło drgań mechanicznych z polem propagacji akustycznej. Sprzęganie tych obszarów odbywa się zwykle za pomocą akustycznej analogii Lighthilla i akustycznych warunków brzegowych Kirhchoffa. W tej publikacji poszukuje się odpowiedzi, jak wielkość i kształt źródła wpływa na dokładność i wrażliwość różnych metod sprzęgania. W tym celu wykonano kilka badań eksperymentalnych z użyciem techniki pomiaru natężenia dźwięku obrazując przestrzenny rozkład przepływu energii akustycznej w otoczeniu przeszkód o różnych kształtach geometrycznych. Jako rezultaty badań przepływów pokazano reakcje fali akustycznej na różnego kształtu przeszkody wprowadzone w pole przepływowe. W formach graficznych przedstawiono wyniki badań przepływów wokół płaskiej i okrągłej płyty, nad wnęką akustyczną i we wnętrzach przewodów. Wizualizacja przepływu energii akustycznej w połach rzeczywistych może wyjaśnić wiele szczególnych efektów akustycznych, takich jak rozpraszanie i tworzenie się wirów za przeszkodą lub podobne reakcje w obszarach, dla których trudno jest budować modele numeryczne.

Źródło:

Mechanics and Control; 2014, 33, 1; 26-36
2083-6759
2300-7079

Pojawia się w:

Mechanics and Control

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Dyskursy, performanse tekstowe i narracje transmedialne polskich piosenek rockowych

Autorzy:

Tański, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/2030972.pdf

Data publikacji:

2018-12-16

Wydawca:

Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego

Tematy:

rock song
anthropology of sound
sound studies
performativity
piosenka rockowa
audioantropologia
performatyka

Opis:

There are a few reasons why a song, in its broad sense, is not the main focus of the present study, but its variety – a particular attention is devoted to the genre of the so-called rock music. Firstly, in my opinion, this work of art currently seems to be the most interesting, resonating, as well as artistically and aesthetically valuable. Secondly, the qualitative and quantitative intensity of the genre is priceless. Thirdly and finally, the influence of this very sort of musical activity on the 20th century is commonly known not only through a powerful impact of various counterculture areas in which rock music found its own reason for existence, but mostly owing to being what it is – a performative artistic output in which different areas of art – music, lyrics, visuals and others – correspond with one another. Awarding the Nobel Prize in Literature in 2016 to Bob Dylan has marked a significant moment in cultural history – the musician gained recognition among the honourable Academy and, by the same token, the song – Dylan’s most commonly used artistic medium has raised cultural awareness, reaching out to a wider public. But did it really have to reach out to listeners? Is it not true that a song has been a soundtrack to our lives being constantly present in them? Maybe the decision which the Academy has made was only a formality – lyrics are very important and it is only up to us what meaning we assign to them. This paper aims to interpret selected lyrics of Polish rock songs, considering them as a significant part of the history of the Polish literature.

Źródło:

Tematy i Konteksty; 2018, 13, 8; 522-540
2299-8365

Pojawia się w:

Tematy i Konteksty

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Cisza, "diminuendo" i "fermata" w muzyce poezji (na przykładzie Gerarda Manleya Hopkinsa)
Silence, Diminuendo, and Fermata in the Music of Poetry (in the Works of Gerard Manley Hopkin

Autorzy:

Borkowska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/467434.pdf

Data publikacji:

2016

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

dźwięk
cisza
przemilczanie
fermata
nieobecność dźwięku
sound
silence
silencing
absence of sound

Opis:

Silence does not always mean the absence of sounds; contrariwise, as in Heidegger, it is charged with sonority which, as in Hopkins, “erupts” with the symphony of sounds. Hopkins’s poem "The Wreck of the Deutschland" (1875) was written after seven years of silence that preceded the poet’s entering the Society of Jesus. He destroyed all poems he had written before 1875 when he was requested by the rector of the college where he studied to write something about the wreck of the ship off the shores of the North Sea when "five Franciscan nuns drowned between midnight and morning of December 7th, 1875.” He responded to the challenge and in thirty-five stanza masterpiece which presented one of the biggest poetic elegies of Victorian England. All Hopkins’s poems are not only a polyphony of sounds articulated in Sprung Rhythm but also the moments of silence, as in The Windhover in which the description of Nature in the octet is divided from the sestet by the caesura of the rest or pause (fermata in music) or the pianissimo followed by meditation on Christ’s passion. The “grammar of creation” in poetry and music has its own rules; usually the invocation of the poem is a loud symphony of sound which progressively tends to fall silent in the final code of the poem or the musical piece. Silence is usually associated with the contemplation of Sacrum but also with the time of creation in the poet’s (composer’s) mind; each poem (or a musical work) is a kind of “spiritual exercise" (Loyola) which is practiced until the final diminuendo that reduces force and loudness of sound to the quietness of death.
Artykuł "Cisza, 'diminuendo' i 'fermata' w muzyce poezji (na przykładzie Gerarda Manleya Hopkinsa)" jest próbą opisania znaczenia dźwięków i ciszy w poezji i muzyce, gdyż właśnie w tych sztukach ich wzajemna współpraca odgrywa wielką rolę. Cisza to nie tylko znużenie artysty i odpoczynek spowodowany ustaniem dźwięków, ale wymowa tego, co niesłyszalne, gdyż glosy ciszy bywają bardziej wymowne niż nieobecność dźwięków. Artykuł jest apologią nieco innej ciszy niż pragnie tego kanadyjski kompozytor R.Murray Schafer; mowa tutaj o tych dźwiękach lub takiej ciszy, którą proklamuje angielski poeta G.M. Hopkins (1844-1889). Hopkins wręcz nakazuje czytelnikowi, by "czytał jego poezję uchem". Tak więc poezja to z jednej strony wymowna muzyka, a z drugiej strony "fermata ciszy", w czasie której albo dojrzewa znaczenie (instress), albo poeta sygnalizuje, iż zmienia retorykę w kierunku kontemplacji. Mamy zatem w poezji dźwięki, ciszę, przemilczanie (Szymborska), rytm (wybuchowy, Sprung Rhythm jak u Hopkinsa), który często jest niemal najważniejszym środkiem wyrażania językowego, ale także całe sekwencje dźwięków, które wyłaniają się z ciszy, jak u T.S. Eliota, i tworzą muzykę języka. Słowa-dźwięki są żywe, w ciągłym ruchu, "napięte, pękają", ciągłe rozedrgane, nie potrafią "znieruchomieć", jak to ujmuje poeta. Poeta nadaje imiona rzeczom, ale stale pozostawia coś, co nie zostanie nigdy nazwane, co ukrywa sie w cieniu ciszy metafory, pozostaje niedopowiedziane lub całkiem niewypowiedziane. Słowa-dźwięki giną w mrokach refleksji i kontemplacji i dlatego medytacje Hopkinsa wedle "ćwiczeń duchowych" Ignacego Loyoli nabierają znaczenia jako rezultat przemyślenia w ciszy. Cisza i pamięć łączą sie ze sobą, gdy nieobecność dźwięku otwiera głębokie pokłady przypominania i owocuje poetyckim wyznaniem. U Hopkinsa cisza zostaje "wypowiedziana" poprzez "niesłyszalny glos muzyki duchowej". Ów moment w biografii poety zbiega się z przejściem od ciszy do dźwięku, swoistej konwersji nie tylko ku wierze, ale nade wszystko w sztuce tworzenia, gdy przerywa ciszę, by skomponować największe swe dzieło "Katastrofa statku Deutschland". W finale pozostaje jednak cisza, pożegnanie z dźwiękiem przy "przejściu zapory" (Tennyson), gdy dźwięk zamiera (diminuendo) i poeta może usłyszeć głos Ciszy. 

Źródło:

ER(R)GO: Teoria – Literatura – Kultura; 2016, 33
1508-6305
2544-3186

Pojawia się w:

ER(R)GO: Teoria – Literatura – Kultura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Broadening Low-Frequency Band Gap of Double-Panel Structure Using Locally Resonant Sonic Crystal Comprised of Slot-Type Helmholtz Resonators

Autorzy:

Kim, Myong-Jin
Rim, Chun-Gil
Won, Kyong-Su

Powiązania:

https://bibliotekanauki.pl/articles/1953478.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

sound transmission loss
locally resonant sonic crystal
double-panel structure
sound insulation

Opis:

An approach is presented to form and broaden the low-frequency band gap of the double panel structure (DPS) by using a locally resonant sonic crystal (LRSC) in this work. The LRSC is made of cylindrical Helmholtz resonators arranged on square lattice. Their designs are similar to a slot-type resonator, but have different depths of slot. Elongating the slit neck inward and distributing the depths of slots produce a broad local resonant band gap at low frequencies: an average insertion loss (IL) of 10.9 dB covering 520 Hz to 1160 Hz with a LRSC of 12 cm width. Next, the effect of porous material filled into the resonators on the local resonant band gap is evaluated. It is shown that filling of porous material into the resonators decreases the height and width of the local resonant band gap. Finally, the transmission losses (TLs) through the DPS with LRSC are calculated as a function of the incident angle of the sound wave for LRSC embedded in porous material and not. The results show that the porous material can be significantly reduce the incident angle dependency of TL through the DPS with LRSC.

Źródło:

Archives of Acoustics; 2021, 46, 2; 335-340
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Vittoria agli Assasini! Jak brzmi sukces w grze komputerowej?

Autorzy:

Bajew, Mikołaj

Powiązania:

https://bibliotekanauki.pl/articles/2083170.pdf

Data publikacji:

2022-01-26

Wydawca:

Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach

Tematy:

success
sound
computer game
sounds

Opis:

The paper addresses the issue of the success of the sound of computer game success. To realise this, the author undertook a study of sound samples selected by him, which he considered to be the auditory representation of success in a computer game. The study was carried out with the help of the Reaper computer program and included 9 different sound characters. In the article, the author also reflects on the source and essence of success in a computer game and the game-player-success relationship.

Źródło:

Conversatoria Linguistica; 2021, 13; 7-24
1897-1415

Pojawia się w:

Conversatoria Linguistica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Environmental noise, its types and effects on health

Autorzy:

Magiera, A.

Powiązania:

https://bibliotekanauki.pl/articles/2087082.pdf

Data publikacji:

2021

Wydawca:

Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny

Tematy:

sound
environmental noise
health aspects

Opis:

Noise can be defined as an undesirable sound that pollutes the environment. If noise is continuous and exceeds certain levels, negative effects on health can be observed. In recent years, the impact of environmental noise (road traffic noise, railway traffic noise, air traffic noise and industrial noise) on human health has come under increasingly intense scrutiny. Noise can cause a number of negative effects on health that directly or indirectly affect humans. The occurrence of some certain and harmful health effects drives the onset of others and may contribute to the development of various diseases. Health is not only a state of physical well-being, but also mental well-being. Mental health primarily depends on the quality of life, which can be affected by various environmental factors, such as noise. An important aspect of fighting noise is the most effective protection of the population by avoiding sources of noise and reducing it. This can be achieved by introducing new technical solutions and new technologies, including devices that generate less noise. Another important measure is educating the society and influencing the change of individual and collective behavior, which may contribute to reducing the harmful factor, which is noise in human life, and minimize the resulting negative effects on health

Źródło:

Roczniki Państwowego Zakładu Higieny; 2021, 72, 1; 41-48
0035-7715

Pojawia się w:

Roczniki Państwowego Zakładu Higieny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Grunnen til at retrofleks l snart er einerådande i hovudstaden Oslo

Autorzy:

Håkon Jahr, Ernst

Powiązania:

https://bibliotekanauki.pl/articles/1047572.pdf

Data publikacji:

2020-12-08

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

sound change
Oslo Norwegian
retroflex

Opis:

This paper describes a sound change involving the lateral system in Oslo Norwegian from ca. 1880 till today. From an early (c. 1880) system comprised of mainly one dental (or alveolar) /l/ in all positions (except for an occasional retroflex [ɭ] for the assimilated cluster [rl]), the retroflex [ɭ] allophone spread during the 20th century to all phonological contexts except following an [a(:)] or [o(:)] in a stressed syllable. Jahr (1975, 1988) claimed that this situation would probably prevail, and the sound change would not be completed and yield a simpler system, because of the attitude of Oslo speakers towards a low-status dialect feature associated with an area southeast of the capital. However, around the turn of the millennium, the development towards a simple one /l/ allophone system nevertheless continued, and children throughout the city started using the retroflex [ɭ] also after [a(:)] and [o(:)]. The last leg of this very long development could be completed, the author claims, because a large region around the capital in the last 50 years has aquired an oral variety based in the capital, but the speakers of this region did not have the negative attitude of the Oslo speakers towards the low-status dialect southeast of Oslo (the Østfold dialect). Therefore, the ‘new’ speakers of the mainly Oslo dialect, from the region around the capital, did not copy the ‘strange’ Oslo exception of the lateral system after the vowels [a(:)] and [o(:)], and this over the years came to have decisive impact also on the speech of young speakers from Oslo itself.

Źródło:

Scripta Neophilologica Posnaniensia; 2020, 20; 81-91
1509-4146

Pojawia się w:

Scripta Neophilologica Posnaniensia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Identification of meat types by ultrasonic methods

Autorzy:

Nowak, K. W.

Powiązania:

https://bibliotekanauki.pl/articles/298316.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

ultrasonics
sound velocity
meat
identification

Opis:

The ability of identification of meat types using ultrasonic measurement was evaluated in this work. Four types of muscles were analyzed (turkey breast and thigh, and pork loin and ham). Ultrasonic measurements were performed at storage (5 ±1oC) and room (20±1oC) temperatures using the through-transmission technique and differential method of determination of sound velocity and the attenuation coefficient. The mean values of sound velocity for the breast, thigh, loin and ham were respectively: 1550.7, 1536.6, 1558.7, 1559.7 m/s at the storage temperature, and 1582.7, 1578.5, 1596.9, 1592.7 m/s at the room temperature. The mean values of the attenuation coefficient in the same order were: 21.3, 23.2, 30.6, 28.1 m-1 and 22.2, 18.9, 22.0, 22.4 m-1. Statistically significant differences in the sound velocity were observed between pork and turkey muscles, therefore, the meat of those species can be identified based on ultrasound measurements of sound velocity. The attenuation coefficient cannot be applied in the identification of meat types due to absence of significant differences in the mean values.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(2); 79-84
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Local Fault Assessment in a Helical Geared System via Sound and Vibration Parameters Using Multiclass SVM Classifiers

Autorzy:

Amarnath, M.

Powiązania:

https://bibliotekanauki.pl/articles/178153.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

gear
ANN
SVM
vibration
sound

Opis:

A gear system transmits power by means of meshing gear teeth and is conceptually simple and effective in power transmission. Thus typical applications include electric utilities, ships, helicopters, and many other industrial applications. Monitoring the condition of large gearboxes in industries has attracted increasing interest in the recent years owing to the need for decreasing the downtime on production machinery and for reducing the extent of secondary damage caused by failures. This paper addresses the development of a condition monitoring procedure for a gear transmission system using artificial neural networks (ANNs) and support vector machines (SVMs). Seven conditions of the gear were investigated: healthy gear and gear with six stages of depthwise wear simulated on the gear tooth. The features extracted from the measured vibration and sound signals were mean, root mean square (rms), variance, skewness, and kurtosis, which are known to be sensitive to different degrees of faults in rotating machine elements. These characteristics were used as an input features to ANN and SVM. The results show that the multilayer feed forward neural network and multiclass support vector machines can be effectively used in the diagnosis of various gear faults.

Źródło:

Archives of Acoustics; 2016, 41, 3; 559-571
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Przedstawienie oraz antropomorfizacja w dyskursie naukowym na przykładzie projektu sonocytologii

Autorzy:

Stasiowska, Justyna

Powiązania:

https://bibliotekanauki.pl/articles/468569.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Wrocławski. Instytut Kulturoznawstwa. Pracownia Badań Pejzażu Dźwiękowego

Tematy:

sound studies
pejzaż dźwiękowy
sonifikacja

Opis:

Presentation and Anthropomorphization in the Scientific Discourse. The Case of Sonocytology The article focuses on the use sonification in hard sciences. Referring to works by Jonathan Sterne and Mitchell Akiyama, I will analyse strategies of auditory display in sonocytology in the context of translation in scientific discourse. The article aims to broaden Bruno Latour’s perspective on the visualisation and framing in the context of sound representation, which will enable me to analyse the process of creating a representation of an organism. Following the Sophia Roosth’s work on sonocytology I will focus on the categories of autonomy and agency, and on the process of animation of research objects.

Źródło:

Audiosfera. Koncepcje – Badania – Praktyki; 2015, 2; 85-96
2450-4467

Pojawia się w:

Audiosfera. Koncepcje – Badania – Praktyki

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 61.

Tytuł:

Recenzja: Katarzyna Krakowiak, Andrzej Kłosak (red.), Słuchawy. Projektowanie dla ucha. Fundacja Bęc Zmiana, Warszawa 2009

Autorzy:

Janikowska, Agata

Powiązania:

https://bibliotekanauki.pl/articles/468573.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Wrocławski. Instytut Kulturoznawstwa. Pracownia Badań Pejzażu Dźwiękowego

Tematy:

audiosfera
pejzaż dźwiękowy
sound art

Źródło:

Audiosfera. Koncepcje – Badania – Praktyki; 2016, 2(4); 100-105
2450-4467

Pojawia się w:

Audiosfera. Koncepcje – Badania – Praktyki

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 62.

Tytuł:

Evaluation of sound quality features on environmental noise effects - a case study applied to road traffic noise

Autorzy:

Paszkowski, W.
Kotus, J.
Poremski, T.
Kostek, B.

Powiązania:

https://bibliotekanauki.pl/articles/221346.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound quality
annoyance
traffic noise

Opis:

The paper shows a study on the relationship between noise measures and sound quality (SQ) features that are related to annoyance caused by the traffic noise. First, a methodology to perform analyses related to the traffic noise annoyance is described including references to parameters of the assessment of road noise sources. Next, the measurement setup, location and results are presented along with the derived sound quality features. Then, statistical analyses are performed to compare the measurement results and sound quality features. The included conclusions are focused on showing that the obtained loudness values, regardless of the used system, are similar in a statistical sense. Contrarily, sharpness, roughness and fluctuation strength values differ for the tools employed.

Źródło:

Metrology and Measurement Systems; 2018, 25, 3; 517-531
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 63.

Tytuł:

Effect of Psychoacoustic Annoyance on EEG Signals of Tractor Drivers

Autorzy:

Lashgari, Majid
Arab, Mohammad Reza
Nadjafi, Mohsen
Rafiee, Mojtaba

Powiązania:

https://bibliotekanauki.pl/articles/31339953.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

EEG
Higuchi
fractal
tractor
sound.

Opis:

The purpose of this study was to evaluate the psychoacoustic annoyance (PA) that the tractor drivers are exposed to, and investigate its effects on their brain signals during their work activities. To this aim, the sound of a garden tractor was recorded. Each driver’s electroencephalogram (EEG) was then recorded at five different engine speeds. The Higuchi method was used to calculate the fractal dimension of the brain signals. To evaluate the amount of acoustic annoyance that the tractor drivers were exposed to, a psychoacoustic annoyance (PA) model was used. The results showed that as the engine speed increased, the values of PA increased as well. The results also indicated that an increase in the Higuchi’s fractal dimension (HFD) of alpha and beta bands was due to the increase of the engine speed. The regression results also revealed that there was a high correlation between the HFD of fast wave activities and PA, in that, the coefficients of determination were 0.92 and 0.91 for alpha and beta bands, respectively. Hence, a good correlation between the EEG signals and PA can be used to develop a mathematical model which quantifies the human brain response to the external stimuli.

Źródło:

Archives of Acoustics; 2022, 47, 4; 469-477
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 64.

Tytuł:

Computer application in music - a survey

Autorzy:

Kotoński, W.

Powiązania:

https://bibliotekanauki.pl/articles/1954535.pdf

Data publikacji:

1999

Wydawca:

Politechnika Gdańska

Tematy:

digital sound synthesis
digital registration of sound
digital sound processing
sampling
samplers
music programs
digital music instruments
simulation of compositional process

Opis:

Two main applications of computers in music - sound synthesis and simulation of the compositional process are presented in this paper. Other applications of computers, such as digital sound recording or editing and mixing of sound tracks are also objects of discussion.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1999, 3, 2; 159-170
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 65.

Tytuł:

Przedmioty dźwiękowe i produkty dźwiękowe: standardy nowej kultury słuchania w pierwszej połowie XX wieku
Sound Objects and Sound Products: Standardising a New Culture of Listening in the First Half of the Twentieth Century

Autorzy:

Hui, Alexandra

Powiązania:

https://bibliotekanauki.pl/articles/466990.pdf

Data publikacji:

2016

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

sound studies
socjologia nauki
słuchanie progowe
obiekty dźwiękowe
STS
threshold listening
sound objects

Opis:

Translated by Justyna Stasiowska, Alexandra Hui's text analyses the emergence of sound objects with regard to the changes that musical culture of the 19th and 20th centuries have undergone and the impact that the invention of a phonograph has had on it. She introduces a new concept of reception, "threshold listening";  it is neither active nor passive act of listening, but rather it marks a psychological and physical response to the stimuli which does not necessarily entail their conscious reception.  
Tłumaczenie tekstu Aleksandry Hui autorstwa Justyny Stasiowskiej. Badaczka analizuje proces powstawania przedmiotów dźwiękowych poprzez skupienie się na zmianach w obrębie kultury muzycznej XIX/XX wieku oraz wpływ jaki miał na nią wynalazek fonografu. Badaczka prowadza pojęcie nowego typu odbioru, czyli słuchania progowego nie będącego ani aktywnym wsłuchiwaniem się ani pasywnym słuchaniem lecz psychofizycznym reagowaniem na bodźce bez konieczności świadomego odbioru ich.

Źródło:

ER(R)GO: Teoria – Literatura – Kultura; 2016, 33
1508-6305
2544-3186

Pojawia się w:

ER(R)GO: Teoria – Literatura – Kultura

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 66.

Tytuł:

Mapy dźwiękowe w Polsce
Sound map of Poland

Autorzy:

Kozak, M.

Powiązania:

https://bibliotekanauki.pl/articles/370504.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

mapa dźwiękowa
audiosfera
field recording
krajobraz dźwiękowy
sound map
audiosphere
sound landscape/ soundscape

Opis:

Mapa dźwiękowa to rodzaj archiwum dźwięków nagranych w terenie. Publikowanie nagrań odbywa się najczęściej poprzez internet na specjalnie do tego przygotowanej platformie umożliwiającej odsłuchiwanie dźwięków i sytuacji fonicznych z wybranego miejsca. Niniejsza praca jest opisem i porównaniem istniejących i udostępnionych map polskich miast i próbą odpowiedzi na pytanie dotyczące możliwości jakie stwarza archiwizowanie nagrań dźwiękowych.
A sound map is a kind of an archive of sounds recorded in the field. Making them public is done through the Internet, on a specially prepared platform which makes it possible to listen to the sounds and phonic situations from the selected place. This paper is a description and comparison of the existing and publicly available sound maps of Polish cities. It is also an attempt to answer the question about the possibilities created by having sound recordings archived.

Źródło:

Przestrzeń i Forma; 2014, 21; 323-338
1895-3247
2391-7725

Pojawia się w:

Przestrzeń i Forma

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 67.

Tytuł:

Inicjatywy publiczno‐prywatne w zakresie kształtowania krajobrazu dźwiękowego w Polsce
Public and private initiatives in soundscape management in Poland

Autorzy:

Bernat, Sebastian

Powiązania:

https://bibliotekanauki.pl/articles/87772.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Geograficzne

Tematy:

krajobraz dźwiękowy
partnerstwo publiczno-prywatne
albumy dźwiekowe
sound landscape
public-private partnership
sound albums

Opis:

Dźwięk jest istotnym elementem krajobrazu, funkcjonuje w powiązaniu z jego pozostałymi komponentami, uzupełnienia obraz, wnosząc nową treść, tworzy atmosferę miejsca, wpływa na ocenę krajobrazu, kształtuje jego charakter (Carles i in., 1999; Landscapes and indiwidua ..., 2003; Tuan, 1987). Rozwojowi cywilizacyjnemu towarzyszą znaczące zmiany w dźwiękowej warstwie krajobrazu. W panoramie miasta średniowiecznego otoczonego murami miejskimi dominował zamek oraz wieże kościelne, z których rozbrzmiewały dzwony oraz hejnały. Dźwięki były wyraziste, autentyczne (jedyne w swoim rodzaju), nieciągłe, przerywane. Ważną rolę odgrywał głos ludzki. Zasięg murów oraz zasięg słyszalności sygnałów dźwiękowych wyznaczał granice społeczności, integrował do wspólnych działań. Współcześnie warstwa dźwiękowa krajobrazu jest mało zróżnicowana, dominuje wszechobecny hałas komunikacyjny, różne odgłosy krzyżują się, włączając się w szum miasta o monotonnej linii brzmieniowej. Skażenie hałasem i nacisk współczesnej cywilizacji na poznanie wizualne utrudniają rozpoznanie jakości dźwięku, porównanie jednego miejsca z innym. W latach 60. kanadyjski kompozytor i muzykolog R.M. Schafer dostrzegł potrzebę zmiany kierunku walki z hałasem. Zaproponował pozytywne spojrzenie na dźwięki wokół nas. Konieczne jest uświadomienie, które dźwięki chcemy zachować, rozwinąć, pomnożyć, by następnie wyodrębnić dźwięki szkodliwe, nużące, które musimy wyeliminować. Sposobem na przeciwstawienie się inwazji wszechogarniającego hałasu jest rozwijanie wrażliwości słuchowej oraz podniesienie jakości estetycznej krajobrazu dźwiękowego poprzez projektowanie akustyczne (soundscape design). Podstawę dla decyzji projektanta powinno stanowić rozpoznanie dźwięków pięknych, niemiłych, wartościowych, znaczących. Istotne jest przy tym uwzględnianie opinii publicznej, co oznacza, że projektowanie akustyczne nigdy nie powinno być projektowaniem odgórnym. Społeczeństwo powinno uczestniczyć w projektowaniu poprzez wybory, które są podejmowane w jego zakresie (Schafer, 1976). W ostatnich latach wzrasta zainteresowanie kształtowaniem przestrzeni publicznych w miastach. Przestrzeń publiczna zaczęła bowiem nabierać coraz większego znaczenia w świetle powrotu do tożsamości, specyfiki i niepowtarzalności miejsc. Atrakcyjne miasta oferują wysoki komfort zamieszkania jego rezydentów. Następuje powrót do wielofunkcyjności, złożoności i rozwiązań interaktywnych, ważną rolę przypisuje się czynnikom społecznym, historycznym i kulturowym, rewitalizacji centrów miejskich, wzmocnieniu konkurencyjności przestrzeni. Dostrzegana jest konieczność dbałości o wysoką jakość dźwięku (akustyczny komfort) w przestrzeni publicznej miast. Na tym tle wzrasta znaczenie projektowania akustycznego w urbanistyce (Raimbault, Dubois, 2005). Celem pracy jest wskazanie przykładów działań w zakresie kształtowania nowej jakości dźwiękowej krajobrazu w Polsce. Odwołano się także do przykładów z innych krajów europejskich. Zwrócono uwagę na ciekawe przedsięwzięcia dokumentacyjne krajobrazów dźwiękowych. Następnie przedstawiono przykłady wkomponowywania dźwięku w przestrzeń publiczną miast, wnętrza ogrodów sensorycznych i ekspozycji muzealnych. Na zakończenie zaproponowano nowe kierunki działań.
The aim of the work is to present some examples of enterprises within domain of management of new quality of sound landscape in Poland, on the background of Europe. The author refers to the literature on landscape architecture, landscape ecology and interdisciplinary researches on sound landscape. He also calls attention to interesting activities in recording data on soundscapes. Then, he gave additional examples of introducing sound into public space in cities, sensory gardens and museum exhibitions. At the end, he suggested new directions for further researches. First of all, the need of actions in the domain of acoustic design was emphasized. This field has a great importance because it lets to recognize places, to consolidate their geographical and cultural identity as well as their peculiarity. Finally, landscape gains new quality. Sounds should be of the highest quality, and of appropriate lasting. They ought to fit surroundings and be accepted by inhabitants. It is vital to take account of information function of sound and importance of silence. Sound must be taken into consideration during planning public space in cities. But natural soundscapes has also great significance. In the case of devastated areas, it is advisable to carry out their acoustic revitalization. This process means improvement of life conditions of inhabitants, economic boom, restoring space order and social relations. All these activities are especially needed in the present times which are dominated by great noise.

Źródło:

Prace Komisji Krajobrazu Kulturowego; 2008, 10; 507-514
1896-1460
2391-5293

Pojawia się w:

Prace Komisji Krajobrazu Kulturowego

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 68.

Tytuł:

Status dźwięku w przestrzeni publicznej
Sound status in the public space

Autorzy:

Strzelczyk, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/398438.pdf

Data publikacji:

2015

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

dźwięk
przestrzeń publiczna
szum
kontekst miejsca
sound art
sound
public place
noise
site specific

Opis:

Artykuł ten próbuje przybliżyć temat relacji dźwięku i przestrzeni na podstawie analizy zmian dyskursu muzycznego. Problematyka ta znajduje odzwierciedlenie zarówno w referowanych tekstach teoretycznych, jak i wybranych praktykach artystycznych. Autor stawia tezę na temat postrzegania rzeczywistości społecznej, sugerując, że gdyby świat brzmiał inaczej, to również inaczej by wyglądał.
This article attempts to bring about the relationship of sound and space on the basis of changes in musical discourse. This problem is reflected both in the referred texts of selected theoretical and artistic practices. The author’s thesis on the perception of social reality, suggesting that if the world sounded different, it is also contrary to look.

Źródło:

Architecturae et Artibus; 2015, 7, 3; 31-36
2080-9638

Pojawia się w:

Architecturae et Artibus

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 69.

Tytuł:

The reactive sound power of a circular plate within the low frequencies
Moc bierna dźwięku płyty kołowej w zakresie niskich częstości

Autorzy:

Rdzanek, W. P.
Rdzanek, W.
Zawieska, W.

Powiązania:

https://bibliotekanauki.pl/articles/328105.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

bierna moc dźwięku
numer modu
promieniowanie dźwięku
reactive sound-power
mode number
sound radiation

Opis:

An efficient low frequency approximation for the reactive sound power of an elastically supported circular plate has been directly derived from the corresponding high frequency expressions presented earlier. The analysis of the approximation error has shown that the low frequency formulation can be applied if the error of 10% can be accepted. The result is valid for any axisymmetric boundary configuration of the plate. The influence of the boundary configuration on the reactive sound power has been examined.
Efektywną aproksymację niskoczęstościową biernej mocy dźwięku płyty kołowej zamocowanej sprężyście wyprowadzono bezpośrednio z odpowiednich wyrażeń wysokoczęstościowych przedstawionych wcześniej. Analiza błędów aproksymacji pokazała, że wzór niskoczęstościowy może być stosowany, jeśli dopuszczalny błąd względny może wynosić do 10%. Otrzymany wynik jest słuszny dla dowolnej osiowosymetrycznej konfiguracji brzegowej płyty. Zbadano wpływ konfiguracji brzegowej na moc bierną.

Źródło:

Diagnostyka; 2005, 34; 59-62
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 70.

Tytuł:

Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures

Autorzy:

Miśkiewicz, A.
Rogala, T.
Rościszewska, T.
Rudzki, T.
Fidecki, T.

Powiązania:

https://bibliotekanauki.pl/articles/177211.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound clarity
room acoustics
psychoacoustics

Opis:

The purpose of the study was to compare auditory judgments of sound clarity of music examples recorded in a concert hall with predictions of clarity made from the impulse response signal recorded in the same hall. Auditory judgments were made with the use of two methods: by rating sound clarity on a numerical scale with two endpoints, and by absolute magnitude estimation. Results obtained by both methods were then compared against the values of clarity indices, C80 and C50, determined from the impulse response of the concert hall, measured in places in which the microphone was located during recording of music examples. Results show that auditory judgments of sound clarity and predictions made from the C80 index yield a similar rank order of data, but the relation between the C80 scale and perceived sound clarity is nonlinear. The data also show that the values of C80 and C50 indices are in very close agreement.

Źródło:

Archives of Acoustics; 2012, 37, 1; 41-46
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 71.

Tytuł:

How does the size distribution of living material influence sound scattering in the sea?

Autorzy:

Szczucka, J.

Powiązania:

https://bibliotekanauki.pl/articles/332270.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

sound scattering
sea
living objects

Opis:

Evaluation of the relative contribution of the living objects with different sizes to sound scattering at sea is presented. The relative contribution to the total scattering depends on two factors: size spectrum of oceanic biomass and individual scattering properties of organisms. Various coefficients in the power function describing dependence of biomass concentration on individual size are tested and compared. Simple high-pass model of scattering is used. Flesh and swimbladder contributions are considered separately.

Źródło:

Hydroacoustics; 2003, 6; 41-48
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Application of non-uniform B-Splines of 2-nd order for description vertical distribution of sound speed in water

Autorzy:

Makar, A.

Powiązania:

https://bibliotekanauki.pl/articles/332798.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

hydroacoustics
B-splines
sound speed

Opis:

Modeling of the vertical distribution of the sound speed in water is useful during determination of the depth on the basis of the acoustic method, modeling refraction phenomena and determination the trajectory of the acoustic wave. For modeling 1D functions (vertical distribution of the sound speed) and 2D (surface of the sea bottom for hydrography) uniform B-Splines was used. In this paper description of uniform B-Splines and description and application of non-uniform B-Splines have been presented.

Źródło:

Hydroacoustics; 2009, 12; 133-140
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 73.

Tytuł:

Analysis of vibroacoustic signals recorded in the passenger lift cabin

Autorzy:

Szydło, K.
Maciąg, P.
Longwic, R.
Lotko, M.

Powiązania:

https://bibliotekanauki.pl/articles/102723.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

vibroisolations
sound measuring
noise emission

Opis:

The analysis of private tests is presented in the article. The applicable tests refer to accelerations, the level of the sound pressure as well as to the sound power emitted by the passenger lift cabin at different technical conditions of the lift. For a group of lifting devices the accelerations were tested at three axes with the use of an accelerometer. The accelerometer was placed in the central part of the cabin with simultaneous measurement of the acoustic parameters with the sound analyzer equipped with sound volume double microphone probe. An attempt was made to determine the impact of the frame - cabin system construction as well as the lift’s technical condition on the recorded parameters. It can allow to establish the limit values of the lift structure parameters under which a rapid drop of comfort takes place, while travelling in the lift as well as to indicate those construction elements the modification of which would affect the improvement of the operation noiselessness.

Źródło:

Advances in Science and Technology. Research Journal; 2016, 10, 30; 193-201
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 74.

Tytuł:

L’animalità nella poesia di Jolanda Insana
The Animality in the Poetry of Jolanda Insana

Autorzy:

Malicka, Paulina

Powiązania:

https://bibliotekanauki.pl/articles/1048391.pdf

Data publikacji:

2018-11-22

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

animal
sound
voice
trace
territory

Opis:

The scope of the article is to reflect upon the argument of animality in the work of the Sicilian poet Jolanda Insana (1937-2016) which represents one of the possible interpretive keys of her works. The analytical part of the paper contains an analysis from the anti-anthropocentric perspective of some fragments of the section Bestia clandestina included in the volume Turbativa d’incanto (2012).

Źródło:

Studia Romanica Posnaniensia; 2018, 45, 3; 35-47
0137-2475
2084-4158

Pojawia się w:

Studia Romanica Posnaniensia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

The Impact of Structural Changes on Sound Pressure Levels in a Neonatal Intensive Care Unit

Autorzy:

Carvalhais, Carlos
Rodrigues, Célia
Xavier, Ana
Silva, Manuela V.
Santos, Joana

Powiązania:

https://bibliotekanauki.pl/articles/1945648.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

noise
layout
design
healthcare
sound

Opis:

The design of neonatal intensive care units (NICU) influences both patient safety and clinical outcomes as well as the acoustic conditions. In NICU exposure to sound pressure levels above the recommended can affect both neonates and healthcare staff. This study aimed to evaluate the sound pressure levels and to assess noise perception of professionals in a NICU before and after structural modifications and layout redesign. The measurements were performed with a sound level meter. A questionnaire was given to staff before and after the intervention. The opinion of healthcare staff regarding noise in NICU was better after the intervention, when compared with the responses previously given. The results showed that noise levels were excessive in the NICU (before and after), exceeding the international recommendations, with the levels ranging between 46.6 dBA to 57.8 dBA before and 52.0 dBA to 54.0 dBA after intervention. Overall, there is a need for more research in order to verify the effectiveness of some actions and strategies to reduce the impact of noise in NICU.

Źródło:

Archives of Acoustics; 2021, 46, 3; 435-442
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Repellence Effect of the New Sound for Underwater Speaker of Hydrofoil

Autorzy:

Nakashima, T.
Kobayashi, N.
Yamada, H.
Katsumata, T.
Yoshida, R.
Kato, H.
Okabe, H.
Kawazu, I.
Yanase, Y.
Omine, M.
Terada, M.
Sugioka, H.
Kyo, M.

Powiązania:

https://bibliotekanauki.pl/articles/116522.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Wydział Nawigacyjny

Tematy:

Underwater Speaker (UWS)
Hydrofoil
Underwater Speaker Sound
Humpback Whale
New Sound
Cetaceans
Acoustics
Hydroacoustics

Opis:

In order to prevent hydrofoil colliding with cetaceans, the underwater speaker (UWS) has been installed to repel cetaceans. Yamada et al. (2012) analyzed and devised the UWS sound as it fits the cetaceans' acoustic properties to prevent the collision furthermore. The new UWS sound was devised and synthesized by Yamada et al. (2015) with expectation of avoiding collision with large cetaceans (Patent applied for, JP2014-171411). In this research project, the new UWS sound was investigated by the playback experiment on humpback whale (Megaptera novaeangliae) and by sighting survey in the actual hydrofoil shipping service route. As a result, a physiological and behavioral change of the humpback whale was observed in the playback experiment of the new UWS sound, and the chance of hydrofoil encountering cetaceans of the new UWS sound was smaller than that of the previous UWS sound. Therefore, the improvement of the new UWS sound was confirmed. Lastly, we wish this research project would contribute toward the safer cruise of hydrofoil in the future.

Źródło:

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 207-211
2083-6473
2083-6481

Pojawia się w:

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

The role of the iconicity of sound within the multisensory environment

Autorzy:

Haverkamp, Michael

Powiązania:

https://bibliotekanauki.pl/articles/2146669.pdf

Data publikacji:

2022

Wydawca:

Politechnika Poznańska. Instytut Mechaniki Stosowanej

Tematy:

sound perception
synesthetic design
iconicity
touch sound
percepcja dźwięku
projekt synestetyczny
ikoniczność
dźwięki dotyku

Opis:

The iconicity of perceived content includes all associative aspects that are intuitively attributed to the stimuli. Sound thus communicates information on the nature of its source. Associative content is essential for the fit of specific sounds in the total background and in the whole multisensory environment. Psychoacoustic parameters of sound contribute to the overall perceptual appearance of auditory elements, but iconicity and semantic content are determining the meaning of sound, which is most important to the listener. An objective iconicity analysis is introduced for the assessment of multisensory aspects of an environment. It is configured for the intuitive selection of appropriate images from a large dataset. In contrast to the common procedure of image-based soundscape analysis, the pictures refer to perceived single aspects, features of materials touched, functional aspects of processes, and emotions. It has successfully been applied to visual and tactile stimuli. Its expected benefit for sound evaluations is discussed.

Źródło:

Vibrations in Physical Systems; 2022, 33, 1; art. no. 2022106
0860-6897

Pojawia się w:

Vibrations in Physical Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Sound absorption coefficients of granular materials
Współczynniki pochłaniania dźwięku materiałów ziarnistych

Autorzy:

Sikora, J.
Turkiewicz, J.

Powiązania:

https://bibliotekanauki.pl/articles/369057.pdf

Data publikacji:

2010

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

współczynnik pochłaniania dźwięku
materiały dźwiękochłonne
zwalczanie hałasu
sound absorption coefficient
sound absorbing materials
noise control

Opis:

This paper presents the results of the expanded research program on sound absorbing properties of granular materials (granular polypropylene, foamed polystyrene, gravelite, rubber, mineral wool, and high-silica sand) being often applied as sound absorbing cores in double-wall partitions of constructions limiting noises of machines and devices.
W artykule przedstawiono wyniki rozszerzonego programu badań właściwości dźwiękochłonnych materiałów ziarnistych (granulaty z polipropylenu, styropianu, keramzytu, gumy, wełny mineralnej, piasek kwarcowy) mających zastosowanie jako rdzenie dźwiękochłonne w przegrodach dwuściennych rozwiązań konstrukcyjnych ograniczających hałas maszyn i urządzeń.

Źródło:

Mechanics and Control; 2010, 29, 3; 149-157
2083-6759
2300-7079

Pojawia się w:

Mechanics and Control

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Sound recording with the application of microphone arrays

Autorzy:

Kornatowski, E.

Powiązania:

https://bibliotekanauki.pl/articles/97513.pdf

Data publikacji:

2011

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

sound recording
array microphone
beamforming
microphone

Opis:

In this article the issues concerning sound recording with the use of three-dimensional systems of several microphones were considered. The issues under study concern the so called beamforming, which is modeling three-dimensional directivity patterns of microphone arrays, as well as modern technologies of multichannel recording production with the purpose of reproduction in surround sound systems.

Źródło:

Computer Applications in Electrical Engineering; 2011, 9; 213-222
1508-4248

Pojawia się w:

Computer Applications in Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Performatywność ciszy – strategia uciszania w działaniach artystycznych
The Performativity of Silence – The Strategy of Silencing in Artistic Activities

Autorzy:

Stasiowska, Justyna Anna

Powiązania:

https://bibliotekanauki.pl/articles/467848.pdf

Data publikacji:

2016

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

sound studies
nauko o sztuce
arts

Opis:

Treating silence as an effect created in a frame of work with manipulation of audience perception helps to overcome the dichotomized opposition of silence and sound. The way audience perception is manipulated helps to create a sphere of silence as in the series of Blackout performances by artist Tres, where all the devices in the building are gradually shut down. The point of departure of the panel comes from  treating this category as performative. This perspective become the foundation for reflection on the active role of audience in a work of art and further departure in power relations in sphere framed as silenced
Abstrakt Traktując ciszę jako efekt wynikający z specyficznej formy ramowania sytuacji w działaniach artystycznych i społecznych artykuł analizuje przykłady „uciszania” odrzucają dychotomiczną opozycję na dźwięk i ciszę. Manipulacja percepcją odbiorcy pozwala na wytworzenie stany ciszy w określonej przestrzenie, jak w przypadku serii performansów pod nazwą Blackout. W ramach konwencji koncertu artysta Tres wyłącza wszystkie działające systemu danego budynku próbując doprowadzić do wyciszenia całości konstrukcji. To działanie fizyczne połączone jest z symboliczną redukcją ukazując jak sama publiczność wytwarza określony stan. Wykorzystując perspektywę performatyki chciałabym skupić się na uciszaniu jako procesie kolonizowania przestrzeni i narzucania określonego porządku poprzez wykorzystywanie technik i technologii w działaniach artystycznych.

Źródło:

ER(R)GO: Teoria – Literatura – Kultura; 2016, 33
1508-6305
2544-3186

Pojawia się w:

ER(R)GO: Teoria – Literatura – Kultura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Ocena klimatu akustycznego tramwaju na postoju i podczas jazdy
Evaluation of the sound climate of the tram on the stop and during the ride

Autorzy:

Tomaszewski, F.
Orczyk, M.
Szymański, G.
Czechyra, B.

Powiązania:

https://bibliotekanauki.pl/articles/253353.pdf

Data publikacji:

2011

Wydawca:

Instytut Naukowo-Wydawniczy TTS

Tematy:

klimat akustyczny
tramwaj
sound climate
tram

Opis:

Transport publiczny nabiera obecnie coraz większego znaczenia w funkcjonowaniu dużych i małych aglomeracji miejskich. Szacuje się, że w miastach zwiększenie ruchu samochodowego o około 10% powoduje dwukrotne zwiększenie czasu przejazdu, zużycia paliwa, emisji środków toksycznych spalin o około 25% i zmniejszenie prędkości komunikacji autobusowej o około 30%. Badania monitoringu hałasu, przeprowadzone przez organa Inspekcji Ochrony Środowiska, wykazały, że liczba osób za-grożonych hałasem w Polsce wynosi 13-15 min, a w porze dziennej średni równoważny poziom dźwięku w centrum miast przekracza poziom 70 dB.

Źródło:

TTS Technika Transportu Szynowego; 2011, 9; 59-61
1232-3829
2543-5728

Pojawia się w:

TTS Technika Transportu Szynowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Sentence Recognition in the Presence of Competing Speech Messages Presented in Audiometric Booths with Reverberation Times of 0.4 and 0.6 Seconds

Autorzy:

Abouchacra, K. S.
Koehnke, J.
Besing, J.
Letowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/177482.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound field testing
reverberation
speech recognition

Opis:

This study examined whether differences in reverberation time (RT) between typical sound field test rooms used in audiology clinics have an effect on speech recognition in multi-talker environments. Separate groups of participants listened to target speech sentences presented simultaneously with 0-to-3 competing sentences through four spatially-separated loudspeakers in two sound field test rooms having RT = 0:6 sec (Site 1: N = 16) and RT = 0:4 sec (Site 2: N = 12). Speech recognition scores (SRSs) for the Synchronized Sentence Set (S3) test and subjective estimates of perceived task difficulty were recorded. Obtained results indicate that the change in room RT from 0.4 to 0.6 sec did not significantly influence SRSs in quiet or in the presence of one competing sentence. However, this small change in RT affected SRSs when 2 and 3 competing sentences were present, resulting in mean SRSs that were about 8–10% better in the room with RT = 0:4 sec. Perceived task difficulty ratings increased as the complexity of the task increased, with average ratings similar across test sites for each level of sentence competition. These results suggest that site-specific normative data must be collected for sound field rooms if clinicians would like to use two or more directional speech maskers during routine sound field testing.

Źródło:

Archives of Acoustics; 2011, 36, 1; 3-14
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Acoustic absorption of a new class of alumina foams with various high-porosity levels

Autorzy:

Zieliński, T. G.
Potoczek, M.
Śliwa, R. E.
Nowak, Ł. J.

Powiązania:

https://bibliotekanauki.pl/articles/177924.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound absorption
porous materials
alumina foam

Opis:

Recently, a new class of ceramic foams with porosity levels up to 90% has been developed as a result of the association of the gelcasting process and aeration of the ceramic suspension. This paper presents and discusses original results advertising sound absorbing capabilities of such foams. The authors man- ufactured three types of alumina foams in order to investigate three porosity levels, namely: 72, 88, and 90%. The microstructure of foams was examined and typical dimensions and average sizes of cells (pores) and cell-linking windows were found for each porosity case. Then, the acoustic absorption coefficient was measured in a wide frequency range for several samples of various thickness cut out from the foams. The results were discussed and compared with the acoustic absorption of typical polyurethane foams proving that the alumina foams with high porosity of 88-90% have excellent sound absorbing properties competitive with the quality of sound absorbing PU foams of higher porosity.

Źródło:

Archives of Acoustics; 2013, 38, 4; 495-502
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Sound Reflection from Overhead Stage Canopies Depending on Ceiling Modification

Autorzy:

Kamisiński, T.
Szeląg, A.
Rubacha, J.

Powiązania:

https://bibliotekanauki.pl/articles/178128.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sound reflection
room acoustics
reflecting structures

Opis:

Reflecting structures placed over the stage in auditoria and concert halls should provide sound reflection in a way that enhances sound emission from the stage without causing acoustic defects in the interior. Model studies conducted by the authors were used to determine the relative level of sound reflection by reflecting structures as a function of frequency for a number of geometric configurations and materials. Analysis of the results allowed drawing conclusions about the effect of modifications of the ceiling over the reflecting panels on the quality of the sound reflected from them. It was shown that modification of the ceiling over the reflecting panels by employing highly sound absorbing materials significantly improved the characteristics of the reflected sound. Also, certain configurations of elements located in the space under the ceiling should be avoided, as the experiments indicated the occurrence of adverse acoustic effects.

Źródło:

Archives of Acoustics; 2012, 37, 2; 213-218
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

„Mikroskop dla uszu”. O XIX-wiecznym słuchaniu Chopina

Autorzy:

Janicki, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/468567.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Wrocławski. Instytut Kulturoznawstwa. Pracownia Badań Pejzażu Dźwiękowego

Tematy:

Chopin
audiosfera
pejzaż dźwiękowy
sound studies

Opis:

In Paris in the first half of the 19th century, the social and urban changes were accompanied by the development of two basic sonic strategies: the first (represented by Berlioz, Musard, Liszt and others, who conquered the mass public in large concert halls) was aimed at competing with the ever more aggressive, modern city soundscape, while the second (represented among others by Chopin) relied on an intimate contact between the artist and listeners gathered in a modestly sized salon. The salon becomes a ‘microscope for ears’, and Chopin’s improvisations may be read as a stream of consciousness. Listening to those improvisations in halfdarkness, receiving the sound with the entire body, and ascribing to the music a mission from ‘ideal’ worlds is testimony to certain ways of musical listening being maintained, and simultaneously a change in music’s position within the hierarchy of arts, as well as a crystallization of a modern social distinction that perspired in the disciplining of the listener’s body and constructing his or her class and environmental ‘sonic identity’.

Źródło:

Audiosfera. Koncepcje – Badania – Praktyki; 2015, 1; 42-51
2450-4467

Pojawia się w:

Audiosfera. Koncepcje – Badania – Praktyki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Wybór systemów nagłośnienia pomieszczeń sakralnych
The issue of the choice of sound systems in public worship

Autorzy:

Rosiński, Adam

Powiązania:

https://bibliotekanauki.pl/articles/2138468.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

sound
church
freqency band
hearing
acoustics

Opis:

The author of the following publication, aware of the shortage of specific literature concerning links between acoustics, architecture and building’s design, sets himself an aim: to depict general problems relevant to architect design of sacred interior reflecting acoustic qualities of each room and to convey useful and basic knowledge to architects, acousticians and clerics referring to the church’s building stage. In the following thesis the most important factors of church’s interior acoustic design are shown because through centuries the discipline caused numerous problems, being difficult to research, recount and neglected. Additional ideas of using natural acoustics of different sacred objects or electro acoustic equipment cause that the following subject area can be adapted in houses of prayer built throughout the years. Therefore the subject of the following article seems to be vitally important and up-to-date because it refers to a specialized field of knowledge of which thorough cognoscence broadens versatility and workshops of the architects, acousticians and clerics, not without influence upon high quality results.

Źródło:

Colloquia Theologica Ottoniana; 2013, 2; 165-183
1731-0555
2353-2998

Pojawia się w:

Colloquia Theologica Ottoniana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Wpływ roślinności na spadek poziomu dźwięku ciągników rolniczych na drodze jego propagacji
The influence of the vegetation as hindrances on the fall of sound level of agricultural tractors on the way of the sound spreading

Autorzy:

Adamczyk, F.

Powiązania:

https://bibliotekanauki.pl/articles/335797.pdf

Data publikacji:

2005

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych

Tematy:

ciągnik rolniczy
poziom dźwięku
roślinność
przeszkoda
fala dźwiękowa
agricultural tractor
sound level
vegetation
sound wave

Opis:

Przedstawiono wyniki badań dotyczące wpływu roślinności rozumianej jako przeszkody na drodze fali dźwiękowej. Wpływ roślinności na falę dźwiękową określono przy pomocy współczynników pochłaniania dźwięku przez środowisko "k" i "k(t)". Analizowano zarówno wartości poziomu dźwięku uzyskane empirycznie jak i uzyskane na drodze aproksymacji funkcją logarytmiczną wartości empirycznych.
Paper presents the results of experimental study of the influence of the vegetation described as hindrances on the way of the sound wave. The influence of the vegetation on the sound wave was described by the absorption factors of the sound by the environment ,,k" and ,,k(t)". Analyzed were two level values of the sound: one obtained experimentally and second obtained on the approximation with the logarithmic function of empirical values.

Źródło:

Journal of Research and Applications in Agricultural Engineering; 2005, 50, 2; 5-9
1642-686X
2719-423X

Pojawia się w:

Journal of Research and Applications in Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Sound absorbing materials from recycled rubber products
Materiały dźwiękochłonne z recyklingu wyrobów gumowych

Autorzy:

Turkiewicz, J.
Sikora, J.

Powiązania:

https://bibliotekanauki.pl/articles/973161.pdf

Data publikacji:

2013

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

sound absorption coefficient
sound absorbing materials
noise control
współczynnik pochłaniania dźwięku
materiały dźwiękochłonne
zwalczanie hałasu

Opis:

This paper concerns the results of comparative research into the acoustical properties of rubber granulates derived from the recycling of conveyor belts production waste. In the process of recycling it is possible to obtain pure granulated rubber and forms contaminated with cotton fibres with a predominance of rubber grains or of cotton fabric. Rubber granulate in the contaminated form is characterized by sound-absorbing properties similar to those of the average-quality mineral wool and other fibrous materials. It can be used as the core of sound-absorbing panels in anti-noise protections. The research results can be used both in the design of acoustical protection as well as in the course of the recycling process of other waste products for obtaining materials with sound absorbing properties.
W artykule przedstawiono wyniki badań porównawczych własności dźwiękochłonnych granulatu gumowego uzyskanego w wyniku recyklingu odpadów produkcyjnych taśm transporterowych. W procesie recyklingu można uzyskać czysty granulat gumowy oraz postacie zanieczyszczone włóknem bawełnianym z przewagą ziaren gumowych lub tkaniny bawełnianej.Granulat gumowy w postaci zanieczyszczonej charakteryzuje się własnościami dźwiękochłonnymi zbliżonymi do własności przeciętnej jakościowo wełny mineralnej i innych materiałów włóknistych. Może być stosowany jako rdzeń dźwiękochłonny w przegrodach warstwowych zabezpieczeń przeciwhałasowych. Przedstawione wyniki badań mogą być wykorzystane zarówno w projektowaniu zabezpieczeń akustycznych, jak i w procesie recyklingu innych zużytych wyrobów pod kątem uzyskiwania materiałów o właściwościach dźwiękochłonnych.

Źródło:

Mechanics and Control; 2013, 32, 3; 117-121
2083-6759
2300-7079

Pojawia się w:

Mechanics and Control

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

High-Directional Sound Propagation Over the Earth’s Surface

Autorzy:

Rakov, Denis S.
Rakov, Aleksandr S.
Chursin, Yury A.
Pavlichev, Vsevolod V.
Igumnov, Artyom O.

Powiązania:

https://bibliotekanauki.pl/articles/1953521.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

parametric loudspeaker
ultrasound
primary frequency
difference frequency
radiation pattern
outdoor propagation of sound
sound attenuation

Opis:

The article discusses the issues of accounting the direction pattern of parametric antenna array the propagation of sound over the Earth’s surface. As a radiator, a parametric antenna array is used. A description is given of measuring equipment and experimental research methods. The Delaney-Bezley model was used as a model of the Earth’s surface impedance. The research results showed the importance of accounting the direction pattern of parametric antenna array in predicting the sound pressure level of a propagating acoustic signal over the Earth’s surface. On the example of a difference signal with a frequency of 2 kHz, the calculation of the sound pressure level on a 100-meter path with the influence of the Earth’s surface is shown. The results obtained showed a good agreement between the theoretical calculation and experimental data.

Źródło:

Archives of Acoustics; 2020, 45, 4; 747-752
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Sound Radiation from a Surface Source Located at the Bottom of the Wedge Region

Autorzy:

Szemela, K.

Powiązania:

https://bibliotekanauki.pl/articles/176912.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wedge region
sound pressure
sound power
Neumann boundary value problem
Helmholtz equation
vibrating piston
Hankel transform

Opis:

Applying rigorous analytical methods, formulas describing the sound radiation have been obtained for the wedge region bounded by two transverse baffles with a common edge and bottom. It has been assumed that the surface sound source is located at the bottom. The presented formulas can be used to calculate the sound pressure and power inside the wedge region. They are valid for any value of the wedge angle and represent a generalization of the formulas describing the sound radiation inside the two and three-wall corner region. Moreover, the presented formulas can be easily adapted for any case when more than one sound source is located at the bottom. To demonstrate their practical application, the distribution of the sound pressure modulus and the sound power have been analyzed in the case of a rectangular piston located at the wedge’s bottom. The influence of the transverse baffle on the sound power has been investigated. Based on the obtained formulas, the behaviour of acoustic fields inside a wedge can be predicted.

Źródło:

Archives of Acoustics; 2015, 40, 2; 223-234
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Measurements of sound isolation by multi-layer materials or structures
Pomiary izolacyjności akustycznej materiałów lub struktur wielowarstwowych

Autorzy:

Deuszkiewicz, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/1955216.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

sound barriers
multilayer materials
sound absorption
noise minimization
przegroda akustyczna
materiały wielowarstwowe
absorpcja dźwięku
minimalizacja hałasu

Opis:

A sound barrier is a structure or device that reduces the level of airborne sound. The basic tasks of such a construction are to provide acoustic insulation and sound absorption. There are many materials available on the market ready to use as such structures used for soundproofing passenger vehicles, construction machinery, power units, etc. In this case, however, the practical use of ready-made materials for minimizing noise requires the use of barriers more complicated in construction than those made of a single material. Thus, each time it is necessary to adjust acoustic parameters of barrier to the individual characteristics of equipment whose acoustic emission we want to reduce. Tests according to standards of such structures require work- and time-consuming and expensive research, e.g. special rooms are required for do this (reverberation and anechoic chambers), which are not always available. In this paper, the author proposes a comparative measurement using a simplified method, which can be used in industrial conditions or small measurement laboratories.
Przegroda dźwiękoizolacyjna jest konstrukcją lub urządzeniem, które zmniejsza poziom dźwięków przenoszonych drogą powietrzną. Podstawowymi zadaniami takiej konstrukcji są zapewnienie izolacji akustycznej oraz pochłanianie dźwięku. Na rynku dostępnych jest wiele materiałów gotowych do wykorzystania jako tego typu konstrukcje stosowane do wygłuszenia pojazdów pasażerskich, maszyn budowlanych, jednostek napędowych itp. W tym przypadku praktyczne wykorzystanie gotowych materiałów do minimalizacji hałasu wymaga jednak stosowania bardziej skomplikowanych w budowie przegród niż wykonane z jednego materiału. Tym samym każdorazowo trzeba dopasowywać parametry akustyczne przegrody do indywidualnych cech urządzenia, którego emisję akustyczną chcemy ograniczyć. Badania zgodne z normami takich struktur wymagają praco- i czasochłonnych oraz kosztownych badań, wymagane do tego są specjalne pomieszczenia (komory pogłosowe i bezechowe), którymi nie zawsze dysponujemy. W artykule autor proponuje pomiar porównawczą metodą uproszczoną możliwą do wykorzystania w warunkach przemysłowych czy też małych laboratoriach pomiarowych.

Źródło:

Diagnostyka; 2021, 22, 4; 107-113
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Using MLS methods in laboratory measurement of airborne sound insulation

Autorzy:

Mleczko, Dominik

Powiązania:

https://bibliotekanauki.pl/articles/2146652.pdf

Data publikacji:

2021

Wydawca:

Politechnika Poznańska. Instytut Mechaniki Stosowanej

Tematy:

sound insulation
sound transmission loss
MLS method
izolacyjność akustyczna
izolacyjność akustyczna od dźwięków powietrznych
metoda MLS

Opis:

Following the requirements of ISO 10140, to determine the acoustic insulation, measurements of the sound pressure levels in the source (L1) and receiving (L2) rooms and the reverberation time measurements in the receiving room (T) should be performed. However, the standard does not indicate the measuring signal to be used for the measurements. Various measurement methods can be used, including the use of the broadband noise or MLS method. The article examines the influence of the applied measurement methodology on the determined spectra of acoustic insulation and the weighted sound reduction index Rw. The total uncertainty of determining the acoustic insulation properties and partial uncertainties in determining L1, L2 and T were also calculated. The analysis of the obtained results allows concluding that the applied measurement method has no significant impact on the obtained acoustic insulation values, and the obtained measurement differences may rather be the result of an insufficient sample size.

Źródło:

Vibrations in Physical Systems; 2021, 32, 2; art. no. 2021205
0860-6897

Pojawia się w:

Vibrations in Physical Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Assessment of the Change in the Tin Concentration in Bronzes to the Basic Components of the Sound of Bells

Autorzy:

Cekus, Dawid
Nadolski, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/2049724.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high-tin bronze
components of the sound of bell
frequency analysis
mechanical properties
velocity of sound

Opis:

The subject of the study was to determine the impact of changes in mechanical properties of high-tin bronzes on the basic components of the sound of a bell. Change in the tin concentration in the range of about 7.5 to 20 parts wt. in a casting alloy significantly affects the mechanical properties of the alloy such as Young’s modulus or hardness. The free vibrations of bells were obtained with the help of the finite element method. In the numerical analyses the mechanical properties of standard alloys were adopted. The obtained natural frequencies of the bell made of a bronze with different tin concentration in copper were compared with the acoustic properties of a real bell casted on the basis of the same ribs. A significant effect of the increase in the alloying share of tin on the obtained results was stated. In addition, the acoustic analysis of aluminum bronze C95500 have been performed. Based on the obtained results, authors stated that this material can replace the commonly used high tin bronze C91300 for the unit production of bells.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 2; 531-535
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

The spectralism of Gerard Grisey: from the nature of the sound to the nature of listening

Autorzy:

Humięcka-Jakubowska, Justyna

Powiązania:

https://bibliotekanauki.pl/articles/780307.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

spectral music
Grisey
sound
timbre
time

Opis:

The paper is an attempt to consider Grisey’s music from an ontological perspective, not only as a cultural product, but above all as an entity derived from the order of nature. The spectral music, as an entity derived from the order of nature, may be studied primarily as mental reality that refers directly to the composer’s stance, physical reality, that refers to the material from which the music is produced, and psychological reality of relating to its perception. In Grisey’s creative attitude, one distinguishes several tendencies. The article describes treating sound as a living organism in time, replacing the idea of timbrematière, from the traditional art of orchestration, with timbre-son, based on the science of acoustics, a processual approach to time and form, taking account in the creative process of human perceptual abilities and seeking a musical language based on scientific premises. These tendencies are described in the context of the composer's statements and examples of his work. Taking the nature of sounds as his starting point, Grisey headed towards the nature of listening, and the effects of this journey are his clearly specified views and their manifestation in composed musical works.

Źródło:

Interdisciplinary Studies in Musicology; 2009, 8; 227-252
1734-2406

Pojawia się w:

Interdisciplinary Studies in Musicology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Retrospecting Polish Audio Engineering Society Membership on 20th Anniversary of the Polish Section of the Audio Engineering Society

Autorzy:

Kostek, B.
Sankiewicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/177356.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

audio and sound engineering
musical acoustics

Opis:

In this article some key events concerning founding Polish Section of the Audio Engineering Society were presented. In addition, the history covering International Symposia on Sound Engineering and Mastering was outlined. Also, papers contained in this issue were shortly reviewed.

Źródło:

Archives of Acoustics; 2011, 36, 2; 187-197
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Multi-Modal Acoustic Flow Decomposition Examined in a Hard Walled Cylindrical Duct

Autorzy:

Weyna, S.
Mickiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/177391.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

acoustics flow
sound intensity
acoustic waveguide

Opis:

Flow fields could be of great interest in the study of sound propagation in aeroengines. For ducts with rigid boundaries, the fluid-resonant category may contribute significantly to unwanted noise. An understanding of the multi-modal propagation of acoustic waves in ducts is of practical interest for use in the control of noise in, for example, aero-engines, automotive exhaust and heating or ventilation systems. The purpose of our experiments was to test the acoustic energy transmission of duct modes based on studies carried out by the sound intensity technique. Sound intensity patterns in circular duct are discussed of modal energy analysis with particular reference to proper orthogonal decomposition and dynamic mode decomposition. The authors try to justify some advantages of the sound intensity experimental research in this area. In the paper, the wide-band sound signal propagated from source approximated with loudspeaker in hard-walled duct is imaged using a sound intensity – based approach. For a simple duct geometry, the sound intensity field is examined visually and by performing a modal decomposition greater insight into the acoustic structures is obtained. The image of sound intensity fields below and above “cut-off” frequency region are found to compare acoustic modes which might resonate in duct.

Źródło:

Archives of Acoustics; 2014, 39, 2; 289-296
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Tracking of the broadband source of the underwater noise in the very shallow water conditions

Autorzy:

Grelowska, G.
Kozaczka, E.

Powiązania:

https://bibliotekanauki.pl/articles/331537.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

broadband signals
shallow water
sound propagation

Opis:

The paper contains the results, both theoretical and experimental, connected with the tracking of the underwater noise source as small ships, pontoon, diver and so on. The problem of security in the shallow water area is the challenge for underwater acousticians. In this paper there is taken into account the detection of the sources that move on the surface of the sea or underwater in shallow and very shallow water. The main goal deals with characterization of the sound propagation at the shallow water channel. The next problem is formulation of the sound propagation inside of this acoustic duct including normal mode creations and dispersion of the acoustic energy. When we take into account the small ships noise the two main sources are analyzed. The first one is the vibration energy produced by the mechanisms located inside of the ship hull. The acoustical energy is transformed through structural elements of the hull to surrounding water. This energy propagates as broadband underwater noise. The next source is the ship propeller. The sources of the underwater noise give the some deposit to the total acoustical energy that means the ambient noise. The problem that should be solved is to discover these acoustical disturbances along with their classification, identification and tracking.

Źródło:

Hydroacoustics; 2015, 18; 77-86
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Propagation of pulsed sound signals on a shelf of free tidal sea: effects from coastal eddies and internal waves

Autorzy:

Mikryukov, A.
Popov, O.
Serebryany, A.

Powiązania:

https://bibliotekanauki.pl/articles/331674.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

pulsed sound signal
Black Sea
hydroacoustic

Opis:

A long term experiment on studying fluctuations of the parameters of pulsed sound signals in a shallow sea was carried out in the region of the northeastern coast of the Black sea in autumn, 2004. the data were collected on a 1.2-km fixed propagation pathat a 2-km distance from the coastline. During the entire experimentation, observations of temperature fluctuations near the receiving point were performed by the using the line temperature sensor. Fluctuations of the shape, energy and propagation time of the pulsed signals were studied. an attempt of their relation to the hydrodynamic processes on the shelf was taken. The change in the shape and the energy levelof the signal was analyzed for the moment of passing the anticyclonic topographic eddy over the coastal zone. It was shown that the fluctuations of the propagation time were sometimes as high as 17.6 ms. An enhanceof the short-period acoustic fluctuations accompanying the internsification of the internal waves was observed.

Źródło:

Hydroacoustics; 2008, 11; 279-288
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Ships underwater noise measurements using sound intensity method

Autorzy:

Gloza, I.

Powiązania:

https://bibliotekanauki.pl/articles/332552.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Akustyczne

Tematy:

underwater noise
ships
sound intensity method

Opis:

Ship noise is a most important part of the field of underwater acoustics. Its reduction and monitoring is an important aspect in the performance of underwater acoustic systems and in the habitability of the vessel for the crew and passengers. In naval operations the noise radiated by a ship is also dominant source of information for underwater sonar systems. Sound intensity is the vector quantity which informs us about the sound power flux, the position and the direction of the sound source. The probe tracks the position of source and at the same time, measures the component of sound-intensity vector. Generally only one component of vector sound intensity was measured, perpendicular to a given measurement surface. The sound intensity of a moving source includes effects such as flow noise that are not present when the source is stationary. The accuracy of measuring acoustic intensity using two closely spaced hydrophones by correcting the phase mismatch error by measuring the transfer function between the two detector systems was examined. The two measuring hydrophone instrumentation systems were earlier calibrated. Our results have been obtained using digital methods, where was used PULSE measuring system.

Źródło:

Hydroacoustics; 2009, 12; 53-60
1642-1817

Pojawia się w:

Hydroacoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 100.

Tytuł:

Hybrid method of evaluation of sounds radiated by vibrating surface elements
Hybrydowa metoda oceny promieniowania dźwięku przez drgające elementy powierzchniowe

Autorzy:

Kozień, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/279619.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

hybrid method
structural vibrations
sound radiation

Opis:

The paper provides the theoretical background of a hybrid method to be applied in engineering evaluation of sound radiation by vibrating surface elements. The intensity vector is obtained at a selected point in the acoustic medium surrounding the vibrating element. For convenience, certain assumptions are made for the purpose of far-field analysis, which makes the method allow for estimation of radiated acoustic pressure. The method is the verified experimentally. Vibrations of structural elements can be predicted theoretically using finite element approach or from the measurement of vibrations of real structures.
W pracy przedstawiono podstawy teoretyczne metody hybrydowej służącej inżynierskiemu oszacowaniu promieniowania akustycznego przez drgające powierzchniowe elementy strukturalne. Metoda umożliwia wyznaczenie wektora natężenia akustycznego w wybranym punkcie ośrodka otaczającego drgający element. Przy pewnych założeniach upraszczających (pole dalekie) możliwa jest estymacja promieniowanego ciśnienia akustycznego. Metoda została zweryfikowana doświadczalnie. Drgania elementu strukturalnego mogą być wyznaczone na drodze teoretycznej metodą elementów skończonych bądź pochodzić z pomiarów drgań rzeczywistych struktur.

Źródło:

Journal of Theoretical and Applied Mechanics; 2005, 43, 1; 119-133
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

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