Absorption peak shift of the micro-perforated panel backed by a shunted loudspeaker

Tao, J and Qiu, X 2014, 'Absorption peak shift of the micro-perforated panel backed by a shunted loudspeaker', in Malcolm J. Crocker, Marek Pawelczyk, Jing Tian (ed.) Proceedings of the 21st International Congress on Sound and Vibration, Beijing, China, 13-17 July 2014, pp. 1-7.


Document type: Conference Paper
Collection: Conference Papers

Title Absorption peak shift of the micro-perforated panel backed by a shunted loudspeaker
Author(s) Tao, J
Qiu, X
Year 2014
Conference name ICSV21
Conference location Beijing, China
Conference dates 13-17 July 2014
Proceedings title Proceedings of the 21st International Congress on Sound and Vibration
Editor(s) Malcolm J. Crocker, Marek Pawelczyk, Jing Tian
Publisher International Institute of Acoustics and Vibration (IIAV)
Place of publication Alabama, United States
Start page 1
End page 7
Total pages 7
Abstract It has been reported that the low frequency absorption of the micro-perforated panel construction can be enhanced by employing a shunted loudspeaker to constitute a composite absorber (MPPSL). Both numerical simulations and experiments discovered that the frequency of the first sound absorption peak of the MPPSL is lower than the resonant frequency of the shunted loudspeaker, while the second absorption peak appears at a higher frequency than the peak of the micro-perforated panel backed with a rigid back wall. Unfortunately, the mechanism for the sound absorption peak frequency shift is not clear and there is lack of a detailed explanation. This paper will investigate this by analyzing the coupling between two components of MPPSL based on the acoustic impedance calculation and discuss implementation issues for practical MPPSL design.
Subjects Signal Processing
Copyright notice © International Institute of Acoustics and Vibration (IIAV), 2014
ISBN 9786165516822
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