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Article: Drum silencer with shallow cavity filled with helium

TitleDrum silencer with shallow cavity filled with helium
Authors
Issue Date2003
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, 2003, v. 114 n. 3, p. 1477-1486 How to Cite?
AbstractThe motivation of this study is twofold: (a) to produce a flow-through silencer with zero pressure loss for pressure-critical applications, and (b) to tackle low frequency noise with limited sideway space using cavities filled with helium. The work represents a further development of our recently conceived device of a drum-like silencer with conventional air cavity [Huang, J. Acoust. Soc. Am. 112, 2014-2025 (2002); Choy and Huang, ibid. 112, 2026-2035 (2002)]. Theoretical predictions are validated by experimental data. The new silencer consists of two highly tensioned membranes lining part of a duct, and each membrane is backed by a cavity filled with helium. For a typical configuration of a duct with height h, membrane length L = 7 h, cavity depth hc = 0.2h, and tension T = 0.52ρ0c0 2h2, where ρ0 and c0 are the ambient density and speed of sound in air, respectively, the transmission loss has a continuous stop band of TL>6.35 dB for frequency 0.03c0/h to 0.064c0/h, which is much better than traditional duct lining. In addition to the mechanisms at work for drum silencers with air cavity, the low density of helium reduces the masslike reactance of the cavity on the second in vacuo mode of membrane vibration. The reduction greatly enhances the membrane response at this mode, which is found to be critical for achieving a broadband performance in the low-frequency regime. © 2003 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/156684
ISSN
2015 Impact Factor: 1.572
2015 SCImago Journal Rankings: 0.938
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChoy, YSen_US
dc.contributor.authorHuang, Len_US
dc.date.accessioned2012-08-08T08:43:31Z-
dc.date.available2012-08-08T08:43:31Z-
dc.date.issued2003en_US
dc.identifier.citationJournal Of The Acoustical Society Of America, 2003, v. 114 n. 3, p. 1477-1486en_US
dc.identifier.issn0001-4966en_US
dc.identifier.urihttp://hdl.handle.net/10722/156684-
dc.description.abstractThe motivation of this study is twofold: (a) to produce a flow-through silencer with zero pressure loss for pressure-critical applications, and (b) to tackle low frequency noise with limited sideway space using cavities filled with helium. The work represents a further development of our recently conceived device of a drum-like silencer with conventional air cavity [Huang, J. Acoust. Soc. Am. 112, 2014-2025 (2002); Choy and Huang, ibid. 112, 2026-2035 (2002)]. Theoretical predictions are validated by experimental data. The new silencer consists of two highly tensioned membranes lining part of a duct, and each membrane is backed by a cavity filled with helium. For a typical configuration of a duct with height h, membrane length L = 7 h, cavity depth hc = 0.2h, and tension T = 0.52ρ0c0 2h2, where ρ0 and c0 are the ambient density and speed of sound in air, respectively, the transmission loss has a continuous stop band of TL>6.35 dB for frequency 0.03c0/h to 0.064c0/h, which is much better than traditional duct lining. In addition to the mechanisms at work for drum silencers with air cavity, the low density of helium reduces the masslike reactance of the cavity on the second in vacuo mode of membrane vibration. The reduction greatly enhances the membrane response at this mode, which is found to be critical for achieving a broadband performance in the low-frequency regime. © 2003 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.titleDrum silencer with shallow cavity filled with heliumen_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.doi10.1121/1.1603232en_US
dc.identifier.scopuseid_2-s2.0-0043193976en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0043193976&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume114en_US
dc.identifier.issue3en_US
dc.identifier.spage1477en_US
dc.identifier.epage1486en_US
dc.identifier.isiWOS:000185269500028-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChoy, YS=7004920275en_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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