Spatial Fourier transform method to determine reflection and absorption coefficient of porous rigid materials applying Johnson-Champoux-Allard model
Conference paper
Aygun, H. (2023). Spatial Fourier transform method to determine reflection and absorption coefficient of porous rigid materials applying Johnson-Champoux-Allard model. https://www.ioa.org.uk/civicrm/event/info?reset=1&id=750. Winchester UK 16 - 17 Oct 2023 Institute of Acoustics.
Authors | Aygun, H. |
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Type | Conference paper |
Abstract | Sound absorption and reflection coefficients of the materials are two important parameters to understand the capacity of the materials to store acoustical energy. Spatial Fourier transform method is based on calculation of complex pressure distributions on two parallel surfaces and decomposing the complex pressure distributions into plane-wave components by using two-dimensional spatial Fourier transform which is used to separate the incident and reflected plane wave components. Johnson-Champoux-Allard model is utilized to predict effective density and bulk modulus of the air in the material, which are used to calculate wave number and characteristic impedance. Consequently, they are used to determine absorption and reflection coefficient of the porous materials at oblique angles. |
Keywords | Spatial Fourier transform, JCA model, absorption, reflection, porous material |
Year | 2023 |
Journal | Proceedings of the Institute of Acoustics |
Publisher | Institute of Acoustics |
Web address (URL) | https://www.ioa.org.uk/sites/default/files/civicrm/persist/contribute/files/Acoustics%202023%20Programme%281%29.pdf |
Accepted author manuscript | License File Access Level Open |
Publication dates | |
16 Oct 2023 | |
Publication process dates | |
Accepted | 16 Sep 2023 |
Deposited | 18 Dec 2023 |
Web address (URL) of conference proceedings | https://www.ioa.org.uk/sites/default/files/civicrm/persist/contribute/files/Acoustics%202023%20Programme%281%29.pdf |
https://openresearch.lsbu.ac.uk/item/95x5v
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Accepted author manuscript
Spatial Fourier transform method to determine reflection and absorption coefficient of porous.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
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