File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Sound absorption of a micro-perforated panel backed by an irregular-shaped cavity

TitleSound absorption of a micro-perforated panel backed by an irregular-shaped cavity
Authors
Issue Date2010
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
Citation
Journal of the Acoustical Society of America, 2010, v. 127 n. 1, p. 238-246 How to Cite?
AbstractIn the pursuit of more effective noise control devices, the cavity backed micro-perforated panel absorber (CBMPPA) is developed in this study. A CBMPPA differs from the conventional micro-perforated panel (MPP) absorber in that the MPP is backed by a trapezoidal cavity, which allows more effective vibroacoustic coupling between the MPP and the cavity. A two-dimensional theoretical model is established and tested both numerically and experimentally. Based on the verified theoretical model, sound absorption performance of a trapezoidal CBMPPA is investigated numerically. Results show that the shape of the backing cavity can significantly alter the sound absorption mechanisms and frequency distribution of overall sound absorption coefficient of the absorber. Further analyses show that acoustic modes that are initially decoupled from the MPP in the rectangular configuration are coupled with the air motion in the MPP, which accounts for the change in absorption pattern of the trapezoidal CBMPPA. By the same token, it also provides the flexibility for tuning the effective absorption range of the absorber. Due to the varying impedance matching conditions, the absorption performance of the trapezoidal CBMPPA exhibits obvious local characteristics over the MPP surface, which contrasts with the spatially uniform absorption in the conventional MPP absorber.
Persistent Identifierhttp://hdl.handle.net/10722/224776
ISSN
2017 Impact Factor: 1.605
2015 SCImago Journal Rankings: 0.938
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, C-
dc.contributor.authorCheng, L-
dc.contributor.authorPan, J-
dc.contributor.authorYu, G-
dc.date.accessioned2016-04-14T08:28:44Z-
dc.date.available2016-04-14T08:28:44Z-
dc.date.issued2010-
dc.identifier.citationJournal of the Acoustical Society of America, 2010, v. 127 n. 1, p. 238-246-
dc.identifier.issn0001-4966-
dc.identifier.urihttp://hdl.handle.net/10722/224776-
dc.description.abstractIn the pursuit of more effective noise control devices, the cavity backed micro-perforated panel absorber (CBMPPA) is developed in this study. A CBMPPA differs from the conventional micro-perforated panel (MPP) absorber in that the MPP is backed by a trapezoidal cavity, which allows more effective vibroacoustic coupling between the MPP and the cavity. A two-dimensional theoretical model is established and tested both numerically and experimentally. Based on the verified theoretical model, sound absorption performance of a trapezoidal CBMPPA is investigated numerically. Results show that the shape of the backing cavity can significantly alter the sound absorption mechanisms and frequency distribution of overall sound absorption coefficient of the absorber. Further analyses show that acoustic modes that are initially decoupled from the MPP in the rectangular configuration are coupled with the air motion in the MPP, which accounts for the change in absorption pattern of the trapezoidal CBMPPA. By the same token, it also provides the flexibility for tuning the effective absorption range of the absorber. Due to the varying impedance matching conditions, the absorption performance of the trapezoidal CBMPPA exhibits obvious local characteristics over the MPP surface, which contrasts with the spatially uniform absorption in the conventional MPP absorber.-
dc.languageeng-
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 America-
dc.titleSound absorption of a micro-perforated panel backed by an irregular-shaped cavity-
dc.typeArticle-
dc.identifier.emailWang, C: chunqiwang@yahoo.com.cn-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1121/1.3257590-
dc.identifier.pmid20058969-
dc.identifier.hkuros180488-
dc.identifier.volume127-
dc.identifier.issue1-
dc.identifier.spage238-
dc.identifier.epage246-
dc.identifier.isiWOS:000273364700030-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats