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Experiments on reflection and transmission of acoustic porous metasurface with composite structure

Experiments on reflection and transmission of acoustic porous metasurface with composite structure
Experiments on reflection and transmission of acoustic porous metasurface with composite structure
A composite structure made by a metal-based porous material, namely porous metasurface here, is designed for good sound absorption performance considering both reflection and transmission. The proposed configuration is a periodic structure containing four slits filled with the porous samples with different thicknesses in one period. Through designing the thicknesses of porous samples, linear phase gradients are generated on reflected and transmitted surfaces respectively, which play key roles for the reflected and refracted behaviors. Using the diffraction theory, the associating behaviors are predicted analytically and also validated by simulations and laboratory tests. Good agreements add confidence on the studies of sound absorption performance. Through adjusting the period length, the good sound absorption can be obtained over a wide range of incident angles at the designed frequency. The proposed composite structure has potential to be applied for noise isolation and sound absorption, where sound transmission is unavoidable.
0263-8223
508-514
Fang, Yi
101f62bc-99cd-4537-b666-3f489342590c
Zhang, Xin
788d80a9-6117-4670-81ef-f8ef2d26d30c
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Fang, Yi
101f62bc-99cd-4537-b666-3f489342590c
Zhang, Xin
788d80a9-6117-4670-81ef-f8ef2d26d30c
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a

Fang, Yi, Zhang, Xin and Zhou, Jie (2018) Experiments on reflection and transmission of acoustic porous metasurface with composite structure. Composite Structures, 185, 508-514. (doi:10.1016/j.compstruct.2017.11.054).

Record type: Article

Abstract

A composite structure made by a metal-based porous material, namely porous metasurface here, is designed for good sound absorption performance considering both reflection and transmission. The proposed configuration is a periodic structure containing four slits filled with the porous samples with different thicknesses in one period. Through designing the thicknesses of porous samples, linear phase gradients are generated on reflected and transmitted surfaces respectively, which play key roles for the reflected and refracted behaviors. Using the diffraction theory, the associating behaviors are predicted analytically and also validated by simulations and laboratory tests. Good agreements add confidence on the studies of sound absorption performance. Through adjusting the period length, the good sound absorption can be obtained over a wide range of incident angles at the designed frequency. The proposed composite structure has potential to be applied for noise isolation and sound absorption, where sound transmission is unavoidable.

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More information

Accepted/In Press date: 20 November 2017
e-pub ahead of print date: 21 November 2017
Published date: 1 February 2018

Identifiers

Local EPrints ID: 418225
URI: http://eprints.soton.ac.uk/id/eprint/418225
ISSN: 0263-8223
PURE UUID: 2612ecfd-fb09-4254-9a8c-4c0ef7bcc5b5

Catalogue record

Date deposited: 23 Feb 2018 17:30
Last modified: 25 Nov 2021 21:14

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Contributors

Author: Yi Fang
Author: Xin Zhang
Author: Jie Zhou

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