Sound absorption of microperforated panel with L shape division cavity structure
| Autor: | Xian-Hui Li, Gai Xiaoling, Fang Wang, Yu Han, Ze-Nong Cai, Tuo Xing, Bin Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
Acoustics and Ultrasonics business.industry Acoustics Noise reduction 02 engineering and technology Division (mathematics) 021001 nanoscience & nanotechnology 01 natural sciences Noise reduction coefficient Optics 0103 physical sciences Equivalent circuit Absorption bandwidth Wide band 0210 nano-technology business Porous medium 010301 acoustics |
| Zdroj: | Applied Acoustics. 122:41-50 |
| ISSN: | 0003-682X |
| DOI: | 10.1016/j.apacoust.2017.02.004 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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