Sound absorption of a microperforated panel backed by an L-type division cavity
GAI Xiaoling1, LI Xianhui1, XING Tuo1, ZHANG Bin1, CAI Zenong1, WANG Fang1, HAN Yu2
1.Beijing Key Laboratory of Environment Noise and Vibration, Beijing MunicipalInstitute of Labor Protection, Beijing 100054, China;
2.Global Energy Interconnection Research Institute, Beijing 102211, China
To improve the sound absorption ability of a single-layer microperforated panel (MPP), an MPP backed by an L-type division cavity was designed.Based on the MPP theory and electro-acoustical equivalent circuit principle, the sound absorption model of a microperforated panel backed by a two-cavity L-type division cavity was built.Simulation and experiment results show that that an MPP with a designed cavity structure has better sound absorption performance and a broader absorption bandwidth than an MPP with a single-cavity structure.This structure is extended to N-cavity segmentation.The experimental results are in agreement with the numerical results.
盖晓玲1，李贤徽1，邢拓1，张斌1，蔡泽农1，王芳1，韩钰2. L型分割背腔的微穿孔板吸声结构的吸声性能研究[J]. 振动与冲击, 2018, 37(16): 256-260.
GAI Xiaoling1, LI Xianhui1, XING Tuo1, ZHANG Bin1, CAI Zenong1, WANG Fang1, HAN Yu2. Sound absorption of a microperforated panel backed by an L-type division cavity. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(16): 256-260.
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