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Sound absorption of microperforated panel with L shape division cavity structure.

Authors :
Gai, Xiao-Ling
Xing, Tuo
Li, Xian-Hui
Zhang, Bin
Wang, Fang
Cai, Ze-Nong
Han, Yu
Source :
Applied Acoustics. Jul2017, Vol. 122, p41-50. 10p.
Publication Year :
2017

Abstract

Microperforated panel (MPP) absorbers have been widely used in noise reduction and are regarded as a promising alternative to the traditional porous materials. However, the absorption bandwidth of a single-layer MPP with limited cavity space is insufficient to compete with the porous materials. In order to improve the sound absorption ability of the single-layer MPP with limited cavity space, MPP with L shape division cavity structure is introduced. Based on the MPP and electro-acoustical equivalent circuit principle, sound absorption properties of MPP with L shape division cavity are studied. Simulation and experimental results show that MPP with L shape division structure have better sound absorption performance than MPP with single cavity structure. Building on L shape division cavity, the extended plate can further improve the sound absorption of MPP. Wide band sound absorption of MPP can be realized with limited cavity space. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0003682X
Volume :
122
Database :
Academic Search Index
Journal :
Applied Acoustics
Publication Type :
Academic Journal
Accession number :
121996902
Full Text :
https://doi.org/10.1016/j.apacoust.2017.02.004