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    Tytuł:
    Localization of sound sources in binaural reproduction of first and third order ambisonics
    Autorzy:
    Sagasti, Amaia
    Pietrzak, Agnieszka Paula
    Martin, Ricardo
    Eguinoa, Rubén
    Powiązania:
    https://bibliotekanauki.pl/articles/2202425.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    ambisonics
    localization
    spatial audio
    listening tests
    ambisonia
    lokalizacja
    dźwięk przestrzenny
    testy słuchania
    Opis:
    The use of higher-order ambisonics in spatial sound recordings makes it possible to increase the accuracy of recording information about the direction from which the sound comes to the listener. However, with binaural ambisonic sound reproduction, the listener's ability to locate the sound source accurately may be limited. This paper presents a comparison of the listener's ability to locate a sound source during binaural listening to recordings made with first and third order ambisonic microphones. The analysis was carried out for two types of signal: pink noise and ringing sound. The analysis of localization errors depending on the ambisonics order, azimuth and elevation angles as well as the type of signal is presented. The obtained data indicate that in binaural reproduction of the ambisonic sound the localization errors in the azimuth plane were smaller for the third order ambisonics, compared to the first order. In the elevation plane both for first and third order the errors were significant.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022214
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Psychoacoustic metrics in the psychological diagnosis of noise annoyance
    Autorzy:
    Radosz, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/24201989.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    noise
    annoyance
    workplace
    sound
    office
    psychoacoustics
    hałas
    uciążliwość
    miejsce pracy
    dźwięk
    biuro
    psychoakustyka
    Opis:
    Aim of the study was to asses noise annoyance in relation to psychoacoustic metrics of sound in an office environment. The Vienna Test System was used for this purpose. Virtual office acoustic environments were developed with sources of different psychoacoustic parameters (loudness, sharpness, fluctuation strength, roughness) but with a constant A-weighted sound pressure level of 55 dB - sound environment with conversations, sound environment with office equipment (computers, printers, telephones) and sound environment with all office noise sources together. The reference environment was a quiet office room with no additional noise sources. Recorded real noise sources were transferred to a virtual 3D sound environment and converted into binaural sound, which was then played back on headphones. During the exposure to each of the acoustic environments, the subjects performed the ALS test (work performance series) and COG test (measurement of attention and concentration) and then assessed the given environment using a questionnaire. The paper presents the results of the statistical analysis - despite different psychoacoustic metrics of office noise sources in the examined acoustic environments, no statistically significant differences were observed in the results of psychological tests.
    Źródło:
    Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023101
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    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
    Tytuł:
    Vibration transmission analysis through mounting elements of wall cladding panels
    Autorzy:
    Idczak, Julia
    Rubacha, Jarosław
    Kamisiński, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2202419.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    impact sound
    transfer function
    sound pressure level
    transmission path
    dźwięk uderzeniowy
    transmitancja operatorowa
    poziom ciśnienia akustycznego
    ścieżki transmisji
    Opis:
    Vibrations in building constructions may propagate through mounting elements to wall cladding panels. It is confirmed that they can have an impact on the sound pressure level radiated from panels and might have a significant influence on the total SPL in a room. In this work possibilities for calculating a parameter determining a change of SPL value depending on the number of panels and its mounting method are presented. A computational model based on vibration velocity measurements was used to estimate the total SPL value in a room. The laboratory and in situ measurements are presented. Transfer function for two elastic elements used as additional elements in a junction was calculated. Finally, ΔLp and ΔLv were calculated, as parameters defining the impact of various panel mounting methods on the reduction of sound pressure level and vibration level value, respectively.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022207
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected aspects of acoustic treatment of the orchestra pit
    Autorzy:
    Kamisiński, Tadeusz
    Brawata, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/24201988.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    first sound reflections
    reverberation time
    early decay time
    reflective screens
    adjustable orchestral barrier
    pierwsze odbicia dźwięku
    czas pogłosu
    czas wczesnego zaniku
    ekrany odbijające dźwięk
    regulowana bariera orkiestronu
    Opis:
    The orchestra pit is not a friendly workplace for musicians, and the need to ensure their interaction with the stage and audience places very high demands on this interior. The aim of the considerations presented in the article was to analyse the various possibilities of acoustic adaptation of the orchestra pit against the background of obtaining the expected effects. The conducted simulation studies and the use of the results of the experimental studies carried out in the well-equipped orchestra pit of the Krakow Opera allowed for the indication of representative acoustic parameters useful for the assessment of the results of acoustic treatment. Based on the comparison of the reverberation time T20 and EDT for various variants of the orchestra pit interior, the confirmation of the legitimacy of using sound diffusing and absorbing systems was obtained. They spread the energy of the first sound reflections in time and reduce the risk to the musicians' hearing. Reflective elements and sound dispersing within the orchestral will ensure adequate audibility between the musicians.
    Źródło:
    Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023104
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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