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Article: Investigation of broadband sound absorption of smart micro-perforated panel (MPP) absorber

TitleInvestigation of broadband sound absorption of smart micro-perforated panel (MPP) absorber
Authors
KeywordsSound absorption
Perforated panel
Electromechanical coupling
Piezoelectric ceramic
Tunable resonance
Issue Date2021
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijmecsci
Citation
International Journal of Mechanical Sciences, 2021, v. 199, p. article no. 106426 How to Cite?
AbstractA smart micro-perforated panel (MPP) is investigated in order to enhance sound absorption performance of MPP absorbers, especially at low frequencies. The smart MPP consists of a conventional MPP and a surface-bonded piezoelectric ceramic (PZT) shunted with single- or multiple-resonance circuit. A three-dimensional (3D) finite element model is used to investigate the coupling effects between MPP and the shunted PZT. The numerical results demonstrate three energy-dissipation mechanisms: mechanical damping, electrical shunt damping, and Helmholtz resonance of the MPP. The effects of different multimode shunt design methods are explored so as to intensify the panel vibration and hence improve sound absorption. A low-frequency broadband sound absorber can then be constructed based on the strong coupling among the acoustical, electrical, and mechanical domains. Several absorption peaks induced by electromechanical coupling are found in the frequencies lower than the Helmholtz resonance frequency of MPP. The electrical and mechanical responses of the proposed absorber are investigated in detail. In the experiment, the transfer function of the shunt circuit of the proposed absorber is tested with a network analyser, and the sound absorption coefficients are measured in the impedance tube based on the two-microphone transfer function method. Fair agreement between experimental and numerical results is obtained.
Persistent Identifierhttp://hdl.handle.net/10722/300307
ISSN
2020 Impact Factor: 5.329
2020 SCImago Journal Rankings: 1.330

 

DC FieldValueLanguage
dc.contributor.authorLIU, X-
dc.contributor.authorWang, C-
dc.contributor.authorZhang, Y-
dc.contributor.authorHuang, L-
dc.date.accessioned2021-06-04T08:41:05Z-
dc.date.available2021-06-04T08:41:05Z-
dc.date.issued2021-
dc.identifier.citationInternational Journal of Mechanical Sciences, 2021, v. 199, p. article no. 106426-
dc.identifier.issn0020-7403-
dc.identifier.urihttp://hdl.handle.net/10722/300307-
dc.description.abstractA smart micro-perforated panel (MPP) is investigated in order to enhance sound absorption performance of MPP absorbers, especially at low frequencies. The smart MPP consists of a conventional MPP and a surface-bonded piezoelectric ceramic (PZT) shunted with single- or multiple-resonance circuit. A three-dimensional (3D) finite element model is used to investigate the coupling effects between MPP and the shunted PZT. The numerical results demonstrate three energy-dissipation mechanisms: mechanical damping, electrical shunt damping, and Helmholtz resonance of the MPP. The effects of different multimode shunt design methods are explored so as to intensify the panel vibration and hence improve sound absorption. A low-frequency broadband sound absorber can then be constructed based on the strong coupling among the acoustical, electrical, and mechanical domains. Several absorption peaks induced by electromechanical coupling are found in the frequencies lower than the Helmholtz resonance frequency of MPP. The electrical and mechanical responses of the proposed absorber are investigated in detail. In the experiment, the transfer function of the shunt circuit of the proposed absorber is tested with a network analyser, and the sound absorption coefficients are measured in the impedance tube based on the two-microphone transfer function method. Fair agreement between experimental and numerical results is obtained.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijmecsci-
dc.relation.ispartofInternational Journal of Mechanical Sciences-
dc.subjectSound absorption-
dc.subjectPerforated panel-
dc.subjectElectromechanical coupling-
dc.subjectPiezoelectric ceramic-
dc.subjectTunable resonance-
dc.titleInvestigation of broadband sound absorption of smart micro-perforated panel (MPP) absorber-
dc.typeArticle-
dc.identifier.emailHuang, L: lixi.huang@hku.hk-
dc.identifier.authorityHuang, L=rp00119-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijmecsci.2021.106426-
dc.identifier.scopuseid_2-s2.0-85103794589-
dc.identifier.hkuros322756-
dc.identifier.volume199-
dc.identifier.spagearticle no. 106426-
dc.identifier.epagearticle no. 106426-
dc.publisher.placeUnited Kingdom-

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