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Conference Paper: Sound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidence
Title | Sound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidence |
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Authors | |
Issue Date | 2014 |
Publisher | Acoustical 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? |
Abstract | Many 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 |
Description | Invited Paper Session 4pNS - Noise: Out on a Limb and Other Topics in Noise: no. 4pNS11 |
Persistent Identifier | http://hdl.handle.net/10722/204240 |
ISSN | 2021 Impact Factor: 2.482 2020 SCImago Journal Rankings: 0.619 |
DC Field | Value | Language |
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dc.contributor.author | Wang, C | en_US |
dc.contributor.author | Huang, L | en_US |
dc.contributor.author | Zhang, Y | en_US |
dc.date.accessioned | 2014-09-19T21:26:45Z | - |
dc.date.available | 2014-09-19T21:26:45Z | - |
dc.date.issued | 2014 | en_US |
dc.identifier.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 | - |
dc.identifier.issn | 0001-4966 | - |
dc.identifier.uri | http://hdl.handle.net/10722/204240 | - |
dc.description | Invited Paper | - |
dc.description | Session 4pNS - Noise: Out on a Limb and Other Topics in Noise: no. 4pNS11 | - |
dc.description.abstract | Many 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 | en_US |
dc.language | eng | en_US |
dc.publisher | Acoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html | - |
dc.relation.ispartof | Journal of the Acoustical Society of America | en_US |
dc.rights | Copyright 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. The following article appeared in Journal of the Acoustical Society of America, 2014, v. 135 n. 4, pt. 2, p. 2380, abstract no. 4pNS11 and may be found at https://doi.org/10.1121/1.4877862 | - |
dc.title | Sound absorption of parallel arrangement of multiple micro-perforated panel absorbers at oblique incidence | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Wang, C: cqwang@hku.hk | en_US |
dc.identifier.email | Huang, L: lixi@hku.hk | en_US |
dc.identifier.email | Zhang, Y: yumin@hku.hk | en_US |
dc.identifier.authority | Huang, L=rp00119 | en_US |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1121/1.4877862 | - |
dc.identifier.hkuros | 239044 | en_US |
dc.identifier.volume | 135 | en_US |
dc.identifier.issue | 4, pt. 2 | - |
dc.identifier.spage | 2380, abstract no. 4pNS11 | - |
dc.identifier.epage | 2380, abstract no. 4pNS11 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0001-4966 | - |