Article ID Journal Published Year Pages File Type
5010718 Applied Acoustics 2017 10 Pages PDF
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.
Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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