Structural acoustic controlled active micro-perforated panel absorber for improving wide-band low frequency sound absorption
Structural acoustic controlled active micro-perforated panel absorber for improving wide-band low frequency sound absorption
This paper investigates the performance of the structural acoustic controlled active micro-perforated panel absorber (SAC-AMPPA), which can achieve wide-band perfect low frequency sound absorption (absorption coefficient is close to 1). The SAC-AMPPA applies point force-controlled backing panel to actively improve the low-frequency sound absorption of the MPPA with the purpose of saving space to suit it better for applications. The theoretical model of the SAC-AMPPA is firstly established using the modal analysis approach. Influence of structure size and point force position on sound absorption performance is explored. Then, the experimental tests were performed to validate the theoretical modeling and findings. Finally, the physical mechanisms of active control are analyzed in detail and some physical insights are summarized. Simplified error sensing strategy for small sized SAC-AMPPA is also constructed. Results obtained show that the preconditions of the point force locating at the center of the backing panel or relatively small sized SAC-AMPPA can guarantee less cavity modes being excited and achieving perfect sound absorption in a very wide controllable bandwidth. The main reason of this lies in the key findings, i.e., except for the (0,0,m) mode, other cavity modes excited by the backing panel cannot contribute to the improvement of low-frequency sound absorption below their resonant frequencies. They radiate sound energy towards the outside of SAC-AMPPA and play a negative role above their resonant frequencies. Provided a uniform cavity sound field is guaranteed in controlled condition, the sound pressure release (PR) and impedance matching (IM) strategies can be used to conveniently construct error sensing strategy of the SAC-AMPPA.
error sensing strategy, micro-perforated panel absorber, low frequency sound absorption, active control, sound absorption mechanism,
Ma, Xiyue
3a164243-817e-4745-aa6f-0a84f6e91b63
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8
Chen, Kean
b236a983-e5b7-42e7-a8a9-b7565187ada8
Wang, Lei
414e92d7-ec71-4a00-9487-757212d6f6f8
Yang, Liu
7fd38a3c-5833-4137-a148-4d02540ec38f
Yang, Kai
eb88e4fd-15d1-4405-88b4-ceca344a5545
1 October 2022
Ma, Xiyue
3a164243-817e-4745-aa6f-0a84f6e91b63
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8
Chen, Kean
b236a983-e5b7-42e7-a8a9-b7565187ada8
Wang, Lei
414e92d7-ec71-4a00-9487-757212d6f6f8
Yang, Liu
7fd38a3c-5833-4137-a148-4d02540ec38f
Yang, Kai
eb88e4fd-15d1-4405-88b4-ceca344a5545
Ma, Xiyue, Yurchenko, Daniil, Chen, Kean, Wang, Lei, Yang, Liu and Yang, Kai
(2022)
Structural acoustic controlled active micro-perforated panel absorber for improving wide-band low frequency sound absorption.
Mechanical Systems and Signal Processing, 178, [109295].
(doi:10.1016/j.ymssp.2022.109295).
Abstract
This paper investigates the performance of the structural acoustic controlled active micro-perforated panel absorber (SAC-AMPPA), which can achieve wide-band perfect low frequency sound absorption (absorption coefficient is close to 1). The SAC-AMPPA applies point force-controlled backing panel to actively improve the low-frequency sound absorption of the MPPA with the purpose of saving space to suit it better for applications. The theoretical model of the SAC-AMPPA is firstly established using the modal analysis approach. Influence of structure size and point force position on sound absorption performance is explored. Then, the experimental tests were performed to validate the theoretical modeling and findings. Finally, the physical mechanisms of active control are analyzed in detail and some physical insights are summarized. Simplified error sensing strategy for small sized SAC-AMPPA is also constructed. Results obtained show that the preconditions of the point force locating at the center of the backing panel or relatively small sized SAC-AMPPA can guarantee less cavity modes being excited and achieving perfect sound absorption in a very wide controllable bandwidth. The main reason of this lies in the key findings, i.e., except for the (0,0,m) mode, other cavity modes excited by the backing panel cannot contribute to the improvement of low-frequency sound absorption below their resonant frequencies. They radiate sound energy towards the outside of SAC-AMPPA and play a negative role above their resonant frequencies. Provided a uniform cavity sound field is guaranteed in controlled condition, the sound pressure release (PR) and impedance matching (IM) strategies can be used to conveniently construct error sensing strategy of the SAC-AMPPA.
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Structural acoustic
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Accepted/In Press date: 9 May 2022
e-pub ahead of print date: 21 May 2022
Published date: 1 October 2022
Additional Information:
Funding Information:
This work was financially supported by the China Postdoctoral Science Foundation (Grant No. 2019M663821), the Fundamental Research Funds for the Central Universities (Grant No. 3102019HHZY030025), the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2018JQ1025), the National Natural Science Foundation of China (NSFC, Grant No. 51705421). Kai Yang would like to thank the support from the Young Topnotch Talent Cultivation Program of Hubei Province.
Publisher Copyright:
© 2022 Elsevier Ltd
Keywords:
error sensing strategy, micro-perforated panel absorber, low frequency sound absorption, active control, sound absorption mechanism,
Identifiers
Local EPrints ID: 469903
URI: http://eprints.soton.ac.uk/id/eprint/469903
ISSN: 0888-3270
PURE UUID: 0d49250e-6ef2-4217-9a04-a98efc342dde
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Date deposited: 28 Sep 2022 16:48
Last modified: 17 Mar 2024 04:11
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Contributors
Author:
Xiyue Ma
Author:
Daniil Yurchenko
Author:
Kean Chen
Author:
Lei Wang
Author:
Liu Yang
Author:
Kai Yang
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