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research-article

Broadening of the sound absorption bandwidth of the perforated panel using a membrane type resonator

[+] Author and Article Information
Xuezhi Zhu

Harbin Institute of Technology, School of Mechatronics Engineering, Harbin, China 92 West Dazhi Street, Nangang Dist., Harbin P.R. China
zxz0001zxz@126.com

Zhao-Bo Chen

Harbin Institute of Technology, School of Mechatronics Engineering, Harbin, China 92 West Dazhi Street, Nangang Dist., Harbin P.R. China
chenzb@hit.edu.cn

Yinghou Jiao

Harbin Institute of Technology, School of Mechatronics Engineering, Harbin, China 92 West Dazhi Street, Nangang Dist., Harbin P.R. China
jiaoyh@hit.edu.cn

Yanpeng Wang

Harbin Institute of Technology, School of Mechatronics Engineering, Harbin, China 92 West Dazhi Street, Nangang Dist., Harbin P.R. China
ypwang@hit.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038942 History: Received July 02, 2017; Revised November 22, 2017

Abstract

In order to broaden the sound absorption bandwidth of perforated panel, a lightweight membrane type resonator is installed in the back cavity of the perforated panel to combine into a compound sound absorber. Because of the great flexibility, the membrane type resonator can be vibrated easily by the incident sound waves passing through the holes of the perforated panel. In low frequency range, the membrane type resonator and the perforated panel constitute a two-degree-of-freedom resonant type sound absorption system. The sound absorption coefficient curve of the compound sound absorber is changed from having single absorption peak of the original perforated panel to having double absorption peaks. By tuning the parameters of the membrane type resonator, the compound sound absorber can obtain a wide frequency band of high sound absorption coefficient. In this paper, the sound absorption coefficient of compound sound absorber is derived analytically combining the vibration equation of membrane type resonator. The influence of the parameter of membrane type resonator on the sound absorption performance of compound sound absorber is numerically analyzed. Finally, the wide band sound absorption capacity of compound sound absorber is validated by experimental test.

Copyright (c) 2017 by ASME
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