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Conference Paper: Numerical study on scattering and absorption by periodically arranged acoustical treatment at oblique incidence
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TitleNumerical study on scattering and absorption by periodically arranged acoustical treatment at oblique incidence
 
AuthorsCheung, SC
Wang, C
Huang, L
 
KeywordsPhysics
Sound
 
Issue Date2012
 
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
 
CitationThe ACOUSTICS 2012 HONG KONG Conference and Exhibition, Hong Kong, 13-18 May 2012. In Journal of the Acoustical Society of America, 2012, v. 131 n. 4, pt. 2, p. 3300-3300, abstract 2aNSb2 [How to Cite?]
DOI: http://dx.doi.org/10.1121/1.4708337
 
AbstractThe propagation of sound over an impedance strip has been a topic of interest in sound abatement design. Excess absorption by the periodical arrangement of two or more distinct impedance conditions has been shown by various theoretical and experimental studies. It is believed that the scattering by the impedance discontinuities can enhance the absorption in some designs. This gives motivation to design a more elaborate set of impedance distribution within one periodic module. In this study, the scattering and absorption by periodically-arranged acoustical treatment at oblique incidence is investigated using the spectral method of Chebyshev collocation. The effects on the sound absorption and reflection by the length of the repeating unit, the angle of incidence and scattering characteristics due to the discontinuities of the acoustical impedance are analyzed. Central to the method is the derivation of out-going waves which allows scattered sound of all directions to leave the computational domain without reflection. The full picture of scattering is captured and analyzed using a rather coarse set of grid suitable for further optimization studies.
 
DescriptionSession 2aNSb (Contributed Papers) - Noise: Numerical Methods in Noise I: abstract 2aNSb2
Starting from p. 3207 of this journal issue is proceedings of ACOUSTICS 2012 HONG KONG
 
ISSN0001-4966
2012 Impact Factor: 1.646
2012 SCImago Journal Rankings: 0.716
 
DOIhttp://dx.doi.org/10.1121/1.4708337
 
DC FieldValue
dc.contributor.authorCheung, SC
 
dc.contributor.authorWang, C
 
dc.contributor.authorHuang, L
 
dc.date.accessioned2012-08-16T06:07:32Z
 
dc.date.available2012-08-16T06:07:32Z
 
dc.date.issued2012
 
dc.description.abstractThe propagation of sound over an impedance strip has been a topic of interest in sound abatement design. Excess absorption by the periodical arrangement of two or more distinct impedance conditions has been shown by various theoretical and experimental studies. It is believed that the scattering by the impedance discontinuities can enhance the absorption in some designs. This gives motivation to design a more elaborate set of impedance distribution within one periodic module. In this study, the scattering and absorption by periodically-arranged acoustical treatment at oblique incidence is investigated using the spectral method of Chebyshev collocation. The effects on the sound absorption and reflection by the length of the repeating unit, the angle of incidence and scattering characteristics due to the discontinuities of the acoustical impedance are analyzed. Central to the method is the derivation of out-going waves which allows scattered sound of all directions to leave the computational domain without reflection. The full picture of scattering is captured and analyzed using a rather coarse set of grid suitable for further optimization studies.
 
dc.description.naturepublished_or_final_version
 
dc.descriptionSession 2aNSb (Contributed Papers) - Noise: Numerical Methods in Noise I: abstract 2aNSb2
 
dc.descriptionStarting from p. 3207 of this journal issue is proceedings of ACOUSTICS 2012 HONG KONG
 
dc.identifier.citationThe ACOUSTICS 2012 HONG KONG Conference and Exhibition, Hong Kong, 13-18 May 2012. In Journal of the Acoustical Society of America, 2012, v. 131 n. 4, pt. 2, p. 3300-3300, abstract 2aNSb2 [How to Cite?]
DOI: http://dx.doi.org/10.1121/1.4708337
 
dc.identifier.doihttp://dx.doi.org/10.1121/1.4708337
 
dc.identifier.epage3300
 
dc.identifier.hkuros203575
 
dc.identifier.issn0001-4966
2012 Impact Factor: 1.646
2012 SCImago Journal Rankings: 0.716
 
dc.identifier.issue4, pt. 2
 
dc.identifier.spage3300
 
dc.identifier.urihttp://hdl.handle.net/10722/160282
 
dc.identifier.volume131
 
dc.languageeng
 
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of the Acoustical Society of America
 
dc.rightsJournal of the Acoustical Society of America. Copyright © Acoustical Society of America.
 
dc.rightsCopyright 2012 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, 2012, v. 131 n. 4, pt. 2, p. 3300-3300, abstract 2aNSb2 and may be found at http://dx.doi.org.eproxy1.lib.hku.hk/10.1121/1.4708337
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
 
dc.subjectPhysics
 
dc.subjectSound
 
dc.titleNumerical study on scattering and absorption by periodically arranged acoustical treatment at oblique incidence
 
dc.typeConference_Paper
 
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<description.abstract>The propagation of sound over an impedance strip has been a topic of interest in sound abatement design. Excess absorption by the periodical arrangement of two or more distinct impedance conditions has been shown by various theoretical and experimental studies. It is believed that the scattering by the impedance discontinuities can enhance the absorption in some designs. This gives motivation to design a more elaborate set of impedance distribution within one periodic module. In this study, the scattering and absorption by periodically-arranged acoustical treatment at oblique incidence is investigated using the spectral method of Chebyshev collocation. The effects on the sound absorption and reflection by the length of the repeating unit, the angle of incidence and scattering characteristics due to the discontinuities of the acoustical impedance are analyzed. Central to the method is the derivation of out-going waves which allows scattered sound of all directions to leave the computational domain without reflection. The full picture of scattering is captured and analyzed using a rather coarse set of grid suitable for further optimization studies.</description.abstract>
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