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    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
    Artykuł
    Tytuł:
    Stanowisko badawcze CIOP-PIB do badań percepcji dźwięku przestrzennego z zastosowaniem techniki ambisonicznej
    CIOP-PIB test stand for studies on spatial sound perception using ambisonics
    Autorzy:
    Szczepański, G.
    Morzyński, L.
    Pleban, D.
    Młyński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/180529.pdf
    Data publikacji:
    2018
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    technika ambisoniczna
    dźwięk przestrzenny
    akustyka środowiska pracy
    percepcja dźwięku
    ambisonics
    spatial sound
    acoustics of the working environment
    sound perception
    Opis:
    W warunkach środowiska pracy sygnały akustyczne mogą być źródłem informacji wpływającej na bezpieczeństwo pracowników. Możliwości percepcji dźwięków, słyszenia kierunkowego czy też orientacji przestrzennej osób w środowisku pracy zależą od szeregu czynników, takich jak właściwości akustyczne pomieszczeń pracy, hałas i jego parametry, ubytki słuchu, stosowanie ochron słuchu czy protez słuchu. Badanie wpływu tych czynników na wymienione możliwości (percepcja, słyszenie kierunkowe, orientacja) wymaga zastosowania dźwięku przestrzennego i ma istotne znaczenie dla tworzenia bezpiecznych warunków pracy. W artykule przedstawiono podstawowe informacje na temat techniki ambisonicznej jako jednej z technik przetwarzania dźwięku przestrzennego. Scharakteryzowano wykonane w Centralnym Instytucie Ochrony Pracy – Państwowym Instytucie Badawczym stanowisko laboratoryjne umożliwiające prowadzenie (z wykorzystaniem techniki ambisonicznej) badań percepcji dźwięków, słyszenia kierunkowego i orientacji przestrzennej osób.
    Acoustic signals can be a source of information affecting workers’ safety in the working environment. Sound perception, directional hearing and spatial orientation of people in the working environment depend on a number of factors, such as acoustic properties of the work room, noise and its parameters, the use of hearing protection, hearing loss or the use of hearing aids. Learning about the impact of these factors on perception, directional hearing and orientation requires using spatial sound and is essential for creating safe working conditions. This article presents basic information about ambisonics, a technique of spatial sound processing, and a test stand developed at the Central Institute for Labour Protection - National Research Institute for research on sound perception, directional hearing and spatial orientation of people using ambisonics.
    Źródło:
    Bezpieczeństwo Pracy : nauka i praktyka; 2018, 10; 24-27
    0137-7043
    Pojawia się w:
    Bezpieczeństwo Pracy : nauka i praktyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Loudspeaker Configurations and Orientations on Sound Localization
    Autorzy:
    Yao, Shu-Nung
    Powiązania:
    https://bibliotekanauki.pl/articles/2141689.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    audio quality
    ambisonics
    immersive sound
    loudspeaker array
    spatial effect
    virtual reality
    Opis:
    As the virtual reality (VR) market is growing at a fast pace, numerous users and producers are emerging with the hope to navigate VR towards mainstream adoption. Although most solutions focus on providing high- resolution and high-quality videos, the acoustics in VR is as important as visual cues for maintaining consistency with the natural world. We therefore investigate one of the most important audio solutions for VR applications: ambisonics. Several VR producers such as Google, HTC, and Facebook support the ambisonic audio format. Binaural ambisonics builds a virtual loudspeaker array over a VR headset, providing immersive sound. The configuration of the virtual loudspeaker influences the listening perception, as has been widely discussed in the literature. However, few studies have investigated the influence of the orientation of the virtual loudspeaker array. That is, the same loudspeaker arrays with different orientations can produce different spatial effects. This paper introduces a VR audio technique with optimal design and proposes a dual-mode audio solution. Both an objective measurement and a subjective listening test show that the proposed solution effectively enhances spatial audio quality.
    Źródło:
    Archives of Acoustics; 2022, 47, 1; 57-70
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reproduction of Phantom Sources Improves with Separation of Direct and Reflected Sounds
    Autorzy:
    Kleczkowski, P.
    Król, A.
    Małecki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/177770.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spatial audio
    multichannel sound reproduction
    phantom sources
    auralization
    ambisonics abbreviations
    IR (impulse response)
    SIR (spatial impulse response)
    RT (reverberation time)
    ANOVA (analysis of variance)
    DS – direct sound
    RSs – reflected sounds
    Opis:
    In virtual acoustics or artificial reverberation, impulse responses can be split so that direct and reflected components of the sound field are reproduced via separate loudspeakers. The authors had investigated the perceptual effect of angular separation of those components in commonly used 5.0 and 7.0 multichannel systems, with one and three sound sources respectively (Kleczkowski et al. (2015b). In that work, each of the front channels of the 7.0 system was fed with only one sound source. In this work a similar experiment is reported, but with phantom sound sources between the front loudspeakers. The perceptual advantage of separation was found to be more consistent than in the condition of discrete sound sources. The results were analysed both for pooled listeners and in three groups, according to experience. The advantage of separation was the highest in the group of experienced listeners.
    Źródło:
    Archives of Acoustics; 2015, 40, 4; 575-584
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of Compound Sound Sources with Adaptive Spatial Radiation for Low-Frequency Active Noise Control Applications
    Autorzy:
    Giouvanakis, Marios
    Sevastiadis, Christos
    Papanikolaou, George
    Powiązania:
    https://bibliotekanauki.pl/articles/1953496.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Low-Bl loudspeakers
    compound sound sources
    adaptive spatial radiation
    active low-frequency noise control
    Opis:
    The proposed compound sound sources for low-frequency noise control applications are composed of dipole sources. Their spatial radiation, which is critical in the modal field of small, closed spaces, is intended to be controlled with independent driving signals of each dipole. The need for small and efficient low-frequency elementary monopole sources led to the proposed vented sub-woofer loudspeaker design with low force factor (low-Bl) drivers. The investigated sources are set up in quadrupole configurations and measured in terms of polar near field response patterns to verify the theoretical predictions. The measurement results consist of the validation of the proposed compound sound sources on the implementation of active noise control problems in the low-frequency range. Also, their small size and modular construction make them interesting for use in other applications.
    Źródło:
    Archives of Acoustics; 2021, 46, 2; 205-212
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-Channel System for Sound Creation in Open Areas
    Autorzy:
    Gołaś, A.
    Suder-Dębska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/176685.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sound creation system
    open area
    spatial impression
    noise
    geometrical method
    inverse image source method
    Opis:
    There are typically two systems in use for sound reinforcement in open areas: the central, “wall of sound” system with speakers localized at the sides of the stage, and the zone system, in which additional speakers are introduced to obtain a uniform sound pressure level throughout the area of listening. In the past two decades the line array systems gained great popularity. The main purpose of their use is to obtain a uniformly distributed sound level throughout the listening area in order to achieve good speech intelligibility. The present paper aims to present an alternative and original method of sound reinforcement in open areas which is in contrast to the above solutions. This new method allows achieving a uniformly distributed sound pressure and good speech intelligibility in the area of interest, and also allows to gain spatial sound impression that accompanies sound reproduction in concert halls. Another advantage of the proposed system is the reduction of the sound level outside the area of interest, i.e. reduction of the noise level outside the area of listening.
    Źródło:
    Archives of Acoustics; 2012, 37, 3; 323-329
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SŁUCH A PERCEPCJA PRZESTRZENI
    Autorzy:
    Skoczek, Zuzanna
    Powiązania:
    https://bibliotekanauki.pl/articles/647069.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    sound
    space
    perception
    process
    hearing
    Wallis
    Schafer
    Blesser
    auditory spatial awareness
    noise
    architecture
    planning
    identification
    soundmarks
    Opis:
    Space is usually perceived and examined as a tridimensional, but visual construct. The article shows it as a process, in which both external (systemic, environmental) and internal (psychological, physical) factors matter. They are important in all kinds of space perception, including the auditory one, which is often disregarded. Meanwhile, it can furnish rich information on one’s point in the space, events happening around, character and function of a place etc. What cannot be ignored is that “auditory spatial awareness” [Blesser, 2007] influences people’s behavior. This is the reason why architects, governments and artists start to pay attention to this phenomenon, while social researchers do surveys. Their cooperation can be seen in Evidence-Based Design architectonic trend or Project for Public Spaces. Similar, but stricter requirements are set by the European Commission. But surrounding sounds are not only damaging and disturbing. Many of them are helpful, provide information, give solace and many are parts of soundmarks, “acoustic landmarks”; are components of identity. Gathering sounds, often ascribed to places, became a new kind of entertainment and artistic activity.
    Źródło:
    Studia Humanistyczne AGH; 2012, 11, 1
    2084-3364
    Pojawia się w:
    Studia Humanistyczne AGH
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysing Sound Environment and Architectural Characteristics of Libraries through Indoor Soundscape Framework
    Autorzy:
    Dokmeci Yorukoglu, P. N.
    Kang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/176427.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    soundscape framework
    indoor space soundscaping
    indoor sound environment
    spatial analysis
    archi-acoustical characteristics
    library
    architectural analysis
    Opis:
    This study presents the indoor soundscape framework in detail by describing the variables and factors that form an indoor soundscape study. The main objective is to introduce a new indoor soundscaping framework and systematically explain the variables that contribute to the overall evaluation of an indoor soundscape. Hence, the dependencies of physical and psychoacoustical factors of the sound environment and the spatial factors of the built entity are statistically tested. The new indoor soundscaping framework leads to an overarching evaluation perspective of enclosed sound environments, combining objective room acoustics research and noise control engineering with architectural analysis. Therefore, it is hypothesized that case spaces with certain plan organisations, volumetric relations, and spatial referencing lead to differentiated sound pressure level (SPL) and loudness (N) values. SPL and N parametric variances of the sound environments are discussed through the statistical findings with respect to the architectural characteristics of each library case space. The results show that the relation between crowd level variances and sound environment parametric values is statistically significant. It is also found that increasing the atrium height and atrium void volume, the atrium’s presence as a common architectural element, and its interpenetrating reference and domain containment results in unwanted variances and acoustic formations, leading to high SPL and N values.
    Źródło:
    Archives of Acoustics; 2016, 41, 2; 203-212
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of spatial hearing testing in occupational medicine
    Autorzy:
    Przewoźny, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2177417.pdf
    Data publikacji:
    2016-06-28
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    spatial hearing
    directional hearing
    sound localization
    hearing testing in workers
    auditory fitness for duty
    hearing impairment
    Opis:
    Dysfunctions of the organ of hearing are a significant limitation in the performance of occupations that require its full efficiency (vehicle driving, army, police, fire brigades, mining). Hearing impairment is associated with poorer understanding of speech and disturbed sound localization that directly affects the worker’s orientation in space and his/her assessment of distance and location of other workers or, even most importantly, of dangerous machines. Testing sound location abilities is not a standard procedure, even in highly specialized audiological examining rooms. It should be pointed out that the ability to localize sounds which are particularly loud, is not directly associated with the condition of the hearing organ, but is rather considered an auditory function of a higher level. Disturbances in sound localization are mainly associated with structural and functional disturbances of the central nervous system and occur also in patients with normal hearing when tested with standard methods. The article presents different theories explaining the phenomenon of sound localization, such as interaural differences in time, interaural differences in sound intensity, monaural spectrum shape and the anatomical and physiological basis of these processes. It also describes methods of measurement of disturbances in sound localization which are used in Poland and around the world, also by the author of this work. The author analyzed accessible reports on sound localization testing in occupational medicine and the possibilities of using such tests in various occupations requiring full fitness of the organ of hearing.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 4; 527-538
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of the spatialisation of water-sounds sequences on the perception of traffic noise
    Autorzy:
    Li, Jian
    Maffei, Luigi
    Pascale, Aniello
    Masullo, Massimiliano
    Powiązania:
    https://bibliotekanauki.pl/articles/2146671.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    spatial variation
    water sound
    traffic noise
    informational masking
    zróżnicowanie przestrzenne
    dźwięk wody
    hałas komunikacyjny
    maskowanie informacyjne
    Opis:
    In the last decades, different researchers have shown the positive effects of informational masking (IM) on mitigating traffic noise perception and improving the local soundscape in urban parks. Most of these studies have tested various water sounds at different signal-to-noise ratios to optimise the selection and the sound levels to set the water sounds playback. However, less is known about the effects of the spatial distribution and movement of water sounds on the perception of the surrounding environment. Three different water-sounds sequences, and one control condition with only traffic noise, were created and used in an online experiment to investigate the role of spatialisation of water-sounds sequences. The sequences include a frontal fixed-position water sound, a two-position switching water sound and a four-position-randomised moving water sound. All of them were superimposed with a background traffic noise. Thirty-six subjects participated and answered an online questionnaire consisting of sets of items to describe the sound’s perception and feeling. The Perceived Restorativeness Scale (PRS-11) was also administered. The results have shown that introducing water-sounds sequences improves some components of the restorative qualities (Fascination and Being-Away). Moreover, different spatialisation settings of water sounds proved to modify people’s perception and feelings in different aspects, including attractiveness, smoothness, mechanicalness, stimulation, and nervousness.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 1; art. no. 2022110
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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