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Article: Broadband sound reflection by plates covering side-branch cavities in a duct

TitleBroadband sound reflection by plates covering side-branch cavities in a duct
Authors
Issue Date2006
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, 2006, v. 119 n. 5, p. 2628-2638 How to Cite?
AbstractWhen a segment of a rigid duct is replaced by a plate backed by a hard-walled cavity, grazing incident sound waves induce plate bending, hence sound reflection. The mechanism is similar to the drumlike silencer with tensioned membranes [L. Huang, J. Acoust. Soc. Am. 112, 2014-2025 (2002)]. However, the logarithmic bandwidth over which the reflection occurs is much wider than that of a drumlike silencer of the same cavity geometry, the typical difference being nearly one octave band. The difference in the silencing performance is explained in terms of the intermodal acoustic interference between the odd and even in vacuo vibration modes. For a given cavity volume, the widest stopband for noise in air is obtained by using long plates with two free lateral edges parallel with the duct axis. The optimal material should be stiff and light, and the critical parameter is found to be the ratio of the Young's modulus over the cube of density. Typically, this ratio is 250 times higher than those of common metallic materials like aluminum alloys, but it is within the reach of existing ultralight foam materials or composite beams with a light core. © 2006 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/156824
ISSN
2015 Impact Factor: 1.572
2015 SCImago Journal Rankings: 0.938
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, Len_US
dc.date.accessioned2012-08-08T08:44:07Z-
dc.date.available2012-08-08T08:44:07Z-
dc.date.issued2006en_US
dc.identifier.citationJournal Of The Acoustical Society Of America, 2006, v. 119 n. 5, p. 2628-2638en_US
dc.identifier.issn0001-4966en_US
dc.identifier.urihttp://hdl.handle.net/10722/156824-
dc.description.abstractWhen a segment of a rigid duct is replaced by a plate backed by a hard-walled cavity, grazing incident sound waves induce plate bending, hence sound reflection. The mechanism is similar to the drumlike silencer with tensioned membranes [L. Huang, J. Acoust. Soc. Am. 112, 2014-2025 (2002)]. However, the logarithmic bandwidth over which the reflection occurs is much wider than that of a drumlike silencer of the same cavity geometry, the typical difference being nearly one octave band. The difference in the silencing performance is explained in terms of the intermodal acoustic interference between the odd and even in vacuo vibration modes. For a given cavity volume, the widest stopband for noise in air is obtained by using long plates with two free lateral edges parallel with the duct axis. The optimal material should be stiff and light, and the critical parameter is found to be the ratio of the Young's modulus over the cube of density. Typically, this ratio is 250 times higher than those of common metallic materials like aluminum alloys, but it is within the reach of existing ultralight foam materials or composite beams with a light core. © 2006 Acoustical Society of America.en_US
dc.languageengen_US
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.htmlen_US
dc.relation.ispartofJournal of the Acoustical Society of Americaen_US
dc.titleBroadband sound reflection by plates covering side-branch cavities in a ducten_US
dc.typeArticleen_US
dc.identifier.emailHuang, L:lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1121/1.2186431en_US
dc.identifier.scopuseid_2-s2.0-33646464549en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33646464549&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume119en_US
dc.identifier.issue5en_US
dc.identifier.spage2628en_US
dc.identifier.epage2638en_US
dc.identifier.isiWOS:000237459500009-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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