Analytical Approximations for Sub Wavelength Sound Absorption by Porous Layers with Labyrinthine Slit Perforations
Analytical approximations for the acoustical properties of a rigid-porous matrix perforated by labyrinthine slits are developed using classical theories for sound propagation in tortuous slits and for sound absorption by double porosity materials. Predictions of enhanced low-frequency absorption res...
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Format: | Article |
Language: | English |
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MDPI AG
2021-04-01
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Series: | Applied Sciences |
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Online Access: | https://www.mdpi.com/2076-3417/11/8/3299 |