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Wyświetlanie 1-15 z 23
Tytuł:
Acoustic Simulation and Experimental Studies of Theatres and Concert Halls
Autorzy:
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1537463.pdf
Data publikacji:
2010-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.55.Ka
43.55.Mc
43.55.Br
Opis:
Paper presents a numerical simulation of the acoustics of selected concert halls performed using CATT-acoustic software, and the results of acoustic measurements performed in these spaces.
Źródło:
Acta Physica Polonica A; 2010, 118, 1; 78-82
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correction of Acoustics in Historic Opera Theatres with the Use of Schroeder Diffuser
Autorzy:
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/176634.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
opera house
Schroeder diffusers
Lviv
underbalcony
horseshoe plan
focusing
scattering
Opis:
The paper deals with the problem of acoustic correction in historic opera theatres with the auditorium layout in the form of a horseshoe with deep underbalcony cavities limited with a semicircular wall surface. Both geometry of the cavities and excessive sound absorption determine acoustic phenomena registered in this area of the hall. The problem has been observed in the Theatre of Opera and Ballet in Lviv, Ukraine, where acoustic tests were carried out, simulation calculations performed, and finally a diffusion panel worked out designed for the rear wall of the underbalcony space. Acoustic measurements carried out after installation of the diffusers revealed favourable changes in the sound strength factor G within the range of medium and high frequencies in the underbalcony and auditorium centre area. By replacing textile tapestry with diffusion panels, a significant reduction of sound absorption was achieved for the frequency range above 1 kHz and an increase of uniformity of acoustic parameters registered in the hall. The method presented in the paper can be applied in historic halls of the similar type as well as contemporary rooms where there is a need for correction of acoustic flaws related to sound focusing or the echo effect.
Źródło:
Archives of Acoustics; 2012, 37, 3; 349-354
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Geometrical and Material Modification of Sound Diffusers on Their Acoustic Parameters
Autorzy:
Pilch, A.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/176935.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Schroeder diffusers
scattering
diffusion
absorption
Opis:
Sound diffusers, in particular those based on changes in the phase of the reflected wave (Schroeder diffusers), have recently gained greatly in popularity in acoustics as an effective means to eliminate defects and improve the acoustic performance of interiors. This paper draws attention to a possibility of shaping acoustic parameters of sound diffusers and fundamental errors made in applying diffusers. Also, an often neglected issue of sound absorption by diffusers has been tackled. The presented results of laboratory measurements indicate a great significance of the diffusers' rigidity and geometry on their absorption coefficient at low frequencies. The effect of arrangement of elements on the diffusion coefficient was analysed for two types of elements based on the prime number N = 7.
Źródło:
Archives of Acoustics; 2011, 36, 4; 955-966
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of parameters of sound reflecting screens
Pomiary parametrów akustycznych struktur refleksyjnych
Autorzy:
Kamisiński, T.
Polaczek, A.
Rubacha, J.
Powiązania:
https://bibliotekanauki.pl/articles/369049.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
panele refleksyjne
sala koncertowa
współczynnik odbicia dźwięku
sound reflecting panels
concert hall
sound reflection efficiency
acoustic upgrade
Opis:
Sound reflecting panels are commonly used in concert and conference halls in order to transmit reflected sound to the audience and improve hearing conditions among musicians. The main problem is to design these elements properly. In this paper, the frequency limits of a useful sound transmission range and the efficiency of reflecting structures are theoretically estimated and experimentally verified.
Panele refleksyjne są powszechnie stosowane w salach koncertowych i audytoryjnych. Głównym ich zadaniem jest przekazywanie odbitego dźwięku w kierunku publiczności oraz poprawa słyszalności pomiędzy muzykami na scenie. Odpowiednie zaprojektowanie takich struktur jest jednak bardzo skomplikowane i czasochłonne. W artykule porównano otrzymane doświadczalnie wartości wybranych parametrów akustycznych struktur refleksyjnych z wartościami wyznaczonymi z teoretycznych wzorów.
Źródło:
Mechanics and Control; 2010, 29, 4; 174-178
2083-6759
2300-7079
Pojawia się w:
Mechanics and Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Can Historic Interiors with Large Cubature be Turned Acoustically Correct?
Autorzy:
Kamisiński, T.
Kulowski, A.
Kinasz, R.
Powiązania:
https://bibliotekanauki.pl/articles/176499.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
acoustic rehabilitation of historic interiors
Schroeder diffusers
microperforated foil
Opis:
Historic interiors with large cubature, such as reception, theatrical, and concert halls, need to be renovated periodically if they are to be preserved as cultural heritage for future generations. In such cases it is necessary to maintain appropriate balance between requirements imposed by heritage conservation authorities office which are usually being given a higher priority, applicable safety regulations, and the comfort of use, including good acoustics. The paper is a presentation of architectural interference in three historic interiors with large cubature leading to changes in their acoustic qualities. In two cases, the changes were beneficial to the functional qualities of the halls to satisfaction of the investors carrying out the renovation work. In the third instance, the architectural interference aimed at showing off the monumental valor of the interior resulted in significant degradation of its acoustics. To remedy the situation impairing the functional program of the facility, corrective measures are proposed neutral with respect to its historic character.
Źródło:
Archives of Acoustics; 2016, 41, 1; 3-14
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of a Device for Positioning Measuring Microphones in Anechoic and Reverberation Chambers
Autorzy:
Felis, J.
Flach, A.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/178139.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
positioning system
manipulator
turntable
anechoic chamber
Opis:
This paper presents a mechanical positioning system for a measuring microphone designed for acoustic studies in anechoic and reverberation chambers at the Department of Mechanics and Vibroacoustics, AGH. The results are discussed in the context of mechanical positioning and its impact on the outcome of the execution of individual measurement procedures. Moreover, areas for research were identified and solution concepts shown for further development of the automation of acoustic measurements in different research rooms in order to reduce the human involvement in them.
Źródło:
Archives of Acoustics; 2012, 37, 2; 245-250
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Narrow Frequency Range Problem of Sound Reflector Arrays
Autorzy:
Szeląg, A.
Rubacha, J.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1400090.pdf
Data publikacji:
2013-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.55.-n
43.20.El
Opis:
Overhead stage canopies composed of many panels suspended under ceiling provide proper acoustic field in concert halls and auditoria. The purpose of using these structures is adequate direction and partial dispersion of sound reflected from them. Frequency range of sound reflected from flat panels closely depends on their shape, size and configuration. It is often too narrow and therefore insufficient for the proper sound of the interior. Mutual dependence of the lower and upper frequency limit of sound transmission requires the search for other ways to improve these structures. The paper proposes some solutions concerning spatial structures which have not been yet defined. An attempt was made to determine the useful frequency band of sound transmitted through such reflective structures.
Źródło:
Acta Physica Polonica A; 2013, 123, 6; 1059-1063
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sound Radiation by Vibrating Building Partitions in Terms of Acceptable Vibration Values
Autorzy:
Szeląg, A.
Stypuła, K.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1196849.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.20.Tb
34.50.Ez
43.40.-r
43.40.+s
Opis:
The subject of this study is an analysis of the phenomenon of sound radiation generated by vibrating building partitions in terms of acceptable vibration values set out in PN-88/B-02171: Evaluation of the vibration impact on people in buildings. The aim of the research was to determine conditions when vibration limits, determined as those providing the required human comfort according to the standard, do not meet the requirements of PN-87/B-02151/02 describing sound level limits in rooms. In order to carry out research showing the phenomenon, various aspects of sound radiation by vibrating building partitions were analyzed theoretically. It was assumed that the vibration velocity of elements did not exceed the limits specified in the standard. Calculations were carried out, in particular, for variants with variable thickness or surface of vibrating partition as well as various types of the construction material. Furthermore, the minimum vibration duration was determined for which the values of noise exceeded the sound level limits.
Źródło:
Acta Physica Polonica A; 2014, 125, 4A; A-122-A-126
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Study of Sound Scattering Structures for the Purposes οf Room Acoustic Enhancement
Autorzy:
Kamisiński, T.
Rubacha, J.
Pilch, A.
Powiązania:
https://bibliotekanauki.pl/articles/1537465.pdf
Data publikacji:
2010-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.20.Fn
43.55.Br
43.58.+z
Opis:
Acoustic structures are currently classified mainly in terms of their acoustic absorption and insulation properties. Knowing the sound scattering parameter can significantly improve the useful value of materials and identify their best applications. Currently no studies are performed in Poland on the sound scattering coefficients of materials. This is due to a complex measurement procedure and a lack of legal requirements. The authors have attempted to make such measurements on the basis of the standard ISO 17497-1:2004: Acoustics - Sound-scattering properties of surfaces - Part 1: Measurement of the random-incidence scattering coefficient in a reverberation room. Measurement and calculation methods are presented, and problems encountered during this study have been described. This issue is of particular importance, especially in the acoustic design of interiors.
Źródło:
Acta Physica Polonica A; 2010, 118, 1; 83-86
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Pressure and Intensity Methods in Evaluating the Directional Diffusion Coefficient
Autorzy:
Pilch, A.
Kamisiński, T.
Zastawnik, M.
Powiązania:
https://bibliotekanauki.pl/articles/1400088.pdf
Data publikacji:
2013-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.55.-n
43.55.Ka
43.55.Mc
43.20.Ei
Opis:
The directional diffusion coefficient characterizes directional uniformity of acoustic energy reflected from a structure. The goal of the paper is to check whether different measurement methods of that coefficient give comparable results and can be used for different diffusing structures. ISO 17497-2:2012 recommends two basic measurement methods for this parameter, both based on sound pressure analysis. In the first method, one microphone and a measurement manipulator is used (the space method), while in the second one, 19 microphones placed on the sound-reflecting plane are required (the boundary method). In the standard it is assumed (as usually in the room acoustics), that the acoustic energy is proportional to the square of sound pressure, what is true only for the plane wave. Correctness of this assumption was checked by the modified space method where the sound intensity probe was installed instead of microphone. The test revealed that pressure methods gave comparable results for both low- and high-diffusion structures, with the boundary method giving moderately higher values for low-diffusion structures and slightly higher for high-diffusion structures. The results obtained in the intensity method were comparable with the pressure method except for the 2000 Hz frequency range.
Źródło:
Acta Physica Polonica A; 2013, 123, 6; 1054-1058
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Acoustic Simulation’s Verification of WFI ATHENA Filterwheel Assembly
Autorzy:
Pilch, A.
Kamisiński, T.
Rataj, M.
Polak, S.
Powiązania:
https://bibliotekanauki.pl/articles/176723.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
filterwheel mechanism
FEM
finite element method
FEM acoustic analysis
ATHENA mission
WFI
Wide Filed Imager
Opis:
Ariane 5 rocket produces very high sound pressure levels during launch, what can influence structures located in the fairing. To reduce risk of damage, launch in vacuum conditions is preferred for noise sensitive instruments. In Wide Filed Imager (WFI) project, the main part of the filterwheel assembly is an extremely thin (~240 nm) filter of large area (170×170 mm), very sensitive to noise and vibrations. The aim of this study was to verify numerical calculations results in anechoic measurements. The authors also checked the influence of WFI geometry and sound absorbing material position on sound pressure level (SPL) affecting the filter mounted inside the assembly. Finite element method (FEM) simulations were conducted in order to obtain noise levels in filter position during Ariane 5 rocket launch. The results will be used in designing of WFI filterwheel assembly and endurance of the filter during launch verification.
Źródło:
Archives of Acoustics; 2017, 42, 3; 483-489
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiar parametrów akustycznych Auli Głównej Politechniki Lwowskiej
Acoustic measurements of Lviv State University Assembly Hall
Autorzy:
Kamisiński, T
Kinash, R
Pilch, A
Rubacha, J
Powiązania:
https://bibliotekanauki.pl/articles/362398.pdf
Data publikacji:
2011
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
akustyka
zrozumiałość mowy STI
czas pogłosu
Politechnika Lwowska
acoustics
speech intelligibility STI
reverberation time
Lviv State University
Opis:
W artykule przedstawiono opis historycznego wnętrza Auli Głównej Politechniki Lwowskiej, w której wykonano badania akustyczne według procedur normatywnych. Zestawiono wyniki pomiarów i obliczeń wybranych parametrów akustycznych Auli. Celem badań była ocena warunków akustycznych wnętrza pod kątem wypełnienia funkcji zgodnych z jego przeznaczeniem. Dane przygotowano dla potrzeb sporządzenia opinii na temat możliwości wykonania adaptacji akustycznej Auli. Napotkanym problemem przy adaptacji takich wnętrz są ograniczenia związane z koniecznością zachowania historycznej struktury obiektu.
The paper concerns the Lviv State University Assembly Hall that was subject to standard acoustic measurements. A selection of results and calculations of acoustic parameters is presented. The main goal of the measurements was an evaluation of the hall’s acoustic conditions that are relevant to fulfilling the hall’s function. The results will be used to prepare an opinion on a possible acoustic adaptation of the hall. One of the challenges commonly encountered in such objects is the necessity to preserve their original architectural structure.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2011, T. 6, nr 3, 3; 23-26
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Measurement Chain on the Impulse Response of a Reverberation Room and Its Application Listening Tests
Autorzy:
Małecki, P.
Zastawnik, M.
Wiciak, J.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1504421.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.55.Hy
43.55.Mc
43.66.Lj
Opis:
There are many objective parameters of the room impulse response which we can calculate that describe its acoustic field. The room impulse response can also be used to provide listening tests using the convolution technique. The aim of this work is to consider the influence of the impulse response measurement chain on objective numerical parameters and on the subjective perception of listeners. This article shows the impulse response measurement results obtained in the reverberation room using not only commonly known measurement chain elements but other elements, too. Standard components such as an omni-directional source and measurement microphone, as well as a consumer active loudspeaker and various audio recording stereo microphone pairs were used. The results are compared taking into consideration calculated numerical parameters and the application of calculated impulse responses to subjective listening tests. To determine the applicability of impulse responses to psychoacoustic listening tests, a preliminary listening test using headphones was carried out on a selected group of listeners. The audio test material consisted of samples of choral music and speech recorded in an anechoic room and convolved with previously analyzed impulse responses. This article shows how big the differences of subjective listener feelings are for different acoustic transducers.
Źródło:
Acta Physica Polonica A; 2011, 119, 6A; 1027-1030
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System for automated acoustic measurements in the anechoic chamber
System do automatycznych badań akustycznych w komorze bezechowej
Autorzy:
Zbrowski, A.
Mężyk, J.
Giesko, T.
Kamisiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/258031.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
pomiar akustyczny
manipulator pomiarowy
komora bezechowa
acoustic measurement
measurement manipulator
anechoic chamber
Opis:
The article presents the developed system for automated acoustic measurements taken in an anechoic chamber. Technical and functional parameters of the system fulfil specific work conditions in the anechoic chamber and meet the requirements for acoustic research. The automated programmed positioning of the measurement microphone in relation to the tested object is possible thanks to the special multi-axial manipulator. The developed construction of the system provides minimal influence on the acoustic properties of the anechoic chamber. The article also presents important issues of the introduction and the verification of the system.
Artykuł prezentuje opracowany system do zautomatyzowanych pomiarów akustycznych prowadzonych w komorze bezechowej. Parametry techniczne i funkcjonalne systemu odpowiadają specyficznym warunkom pracy w komorze bezechowej i wysokim wymaganiom dla badań akustycznych. Automatyczne zaprogramowane pozycjonowanie mikrofonu pomiarowego względem badanego obiektu umożliwia specjalny manipulator wieloosiowy. Opracowana konstrukcja systemu zapewnia minimalny wpływ na własności akustyczne komory bezechowej. W artykule przedstawiono także istotne problemy procesu wdrożenia i weryfikacji systemu.
Źródło:
Problemy Eksploatacji; 2010, 3; 115-125
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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