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Conference Paper: Numerical study on scattering and absorption by periodically arranged acoustical treatment at oblique incidence

TitleNumerical study on scattering and absorption by periodically arranged acoustical treatment at oblique incidence
Authors
KeywordsPhysics
Sound
Issue Date2012
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
Citation
The 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?
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.
DescriptionSession 2aNSb (Contributed Papers) - Noise: Numerical Methods in Noise I: abstract 2aNSb2
Persistent Identifierhttp://hdl.handle.net/10722/160282
ISSN
2013 Impact Factor: 1.555

 

DC FieldValueLanguage
dc.contributor.authorCheung, SCen_US
dc.contributor.authorWang, Cen_US
dc.contributor.authorHuang, Len_US
dc.date.accessioned2012-08-16T06:07:32Z-
dc.date.available2012-08-16T06:07:32Z-
dc.date.issued2012en_US
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 2aNSb2en_US
dc.identifier.issn0001-4966-
dc.identifier.urihttp://hdl.handle.net/10722/160282-
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.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.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 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 incidenceen_US
dc.typeConference_Paperen_US
dc.identifier.emailWang, C: cqwang@hku.hken_US
dc.identifier.emailHuang, L: lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1121/1.4708337-
dc.identifier.hkuros203575en_US
dc.identifier.volume131en_US
dc.identifier.issue4, pt. 2en_US
dc.identifier.spage3300en_US
dc.identifier.epage3300en_US
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 140117-

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