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Conference Paper: Sound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidence

TitleSound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidence
Authors
Issue Date2014
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
Citation
The 167th Meeting of the Acoustical Society of America (ASA), Providence, RI., 5-9 May 2014. In Journal of the Acoustical Society of America, 2014, v. 135 n. 4, pt. 2, p. 2380, abstract no. 4pNS11 How to Cite?
AbstractMany efforts have been made to enhance the sound absorption performance of micro-perforated panel (MPP) absorbers. Among them, one straightforward approach is to arrange multiple MPP absorbers of different frequency characteristics in parallel so as to combine different frequency bands together, hence an MPP absorber array. In previous study, the parallel absorption mechanism is identified to be contributed by three factors: (i) the strong local resonance absorption, (ii) the supplementary absorption by non-resonating absorbers, and (iii) the change of environmental impedance conditions; and the local resonance absorption mechanism accounts for the increased equivalent acoustic resistance of the MPP. This study seeks to examine how the MPP absorber array performs at oblique incidence and in diffuse field. One major concern here is how the incidence angle of the sound waves affects the parallel absorption mechanism. In this study, a finite element model is developed to simulate the acoustic performance of an infinitely large MPP absorber array. Numerical results show that the sound absorption coefficients of the MPP absorber array may change noticeably as the incidence angle varies. The diffuse field sound absorption coefficients of a prototype specimen are measured in a reverberation room and compared with the numerical predictions. © 2014 Acoustical Society of America
DescriptionInvited Paper
Session 4pNS - Noise: Out on a Limb and Other Topics in Noise: no. 4pNS11
Persistent Identifierhttp://hdl.handle.net/10722/204240
ISSN
2015 Impact Factor: 1.572
2015 SCImago Journal Rankings: 0.938

 

DC FieldValueLanguage
dc.contributor.authorWang, Cen_US
dc.contributor.authorHuang, Len_US
dc.contributor.authorZhang, Yen_US
dc.date.accessioned2014-09-19T21:26:45Z-
dc.date.available2014-09-19T21:26:45Z-
dc.date.issued2014en_US
dc.identifier.citationThe 167th Meeting of the Acoustical Society of America (ASA), Providence, RI., 5-9 May 2014. In Journal of the Acoustical Society of America, 2014, v. 135 n. 4, pt. 2, p. 2380, abstract no. 4pNS11en_US
dc.identifier.issn0001-4966-
dc.identifier.urihttp://hdl.handle.net/10722/204240-
dc.descriptionInvited Paper-
dc.descriptionSession 4pNS - Noise: Out on a Limb and Other Topics in Noise: no. 4pNS11-
dc.description.abstractMany efforts have been made to enhance the sound absorption performance of micro-perforated panel (MPP) absorbers. Among them, one straightforward approach is to arrange multiple MPP absorbers of different frequency characteristics in parallel so as to combine different frequency bands together, hence an MPP absorber array. In previous study, the parallel absorption mechanism is identified to be contributed by three factors: (i) the strong local resonance absorption, (ii) the supplementary absorption by non-resonating absorbers, and (iii) the change of environmental impedance conditions; and the local resonance absorption mechanism accounts for the increased equivalent acoustic resistance of the MPP. This study seeks to examine how the MPP absorber array performs at oblique incidence and in diffuse field. One major concern here is how the incidence angle of the sound waves affects the parallel absorption mechanism. In this study, a finite element model is developed to simulate the acoustic performance of an infinitely large MPP absorber array. Numerical results show that the sound absorption coefficients of the MPP absorber array may change noticeably as the incidence angle varies. The diffuse field sound absorption coefficients of a prototype specimen are measured in a reverberation room and compared with the numerical predictions. © 2014 Acoustical Society of Americaen_US
dc.languageengen_US
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html-
dc.relation.ispartofJournal of the Acoustical Society of Americaen_US
dc.rightsJournal of the Acoustical Society of America. Copyright © Acoustical Society of America.-
dc.rightsCopyright 2014 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleSound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidenceen_US
dc.typeConference_Paperen_US
dc.identifier.emailWang, C: cqwang@hku.hken_US
dc.identifier.emailHuang, L: lixi@hku.hken_US
dc.identifier.emailZhang, Y: yumin@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1121/1.4877862-
dc.identifier.hkuros239044en_US
dc.identifier.volume135en_US
dc.identifier.issue4, pt. 2-
dc.identifier.spage2380, abstract 4pNS11-
dc.identifier.epage2380, abstract 4pNS11-
dc.publisher.placeUnited States-

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