Angle-Dependent Absorption of Sound on Porous Materials

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-10-16
Major/Subject
Mcode
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Language
en
Pages
13
753-765
Series
Acoustics, Volume 2, issue 4
Abstract
Sound-absorbing materials are usually measured in a reverberation chamber (diffuse field condition) or in an impedance tube (normal sound incidence). In this paper, we show how angle-dependent absorption coefficients could be measured in a factory-type setting. The results confirm that the materials have different attenuation behavior to sound waves coming from different directions. Furthermore, the results are in good agreement with sound absorption coefficients measured for comparison in a reverberation room and in an impedance tube. In addition, we introduce a biofiber-based material that has similar sound absorption characteristics to glass-wool. The angle-dependent absorption coefficients are important information in material development and in room acoustics modeling.
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Keywords
angle dependent sound absorption, porous materials, wood-based sound absorbers
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Citation
Cucharero Moya , J , Hänninen , T & Lokki , T 2020 , ' Angle-Dependent Absorption of Sound on Porous Materials ' , Acoustics , vol. 2 , no. 4 , pp. 753-765 . https://doi.org/10.3390/acoustics2040041