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Article: Modal analysis of a drumlike silencer

TitleModal analysis of a drumlike silencer
Authors
Issue Date2002
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, 2002, v. 112 n. 5 I, p. 2014-2025 How to Cite?
AbstractLow-frequency duct noise is difficult to deal with by passive methods such as porous duct lining. Reactive methods like expansion chamber are rather bulky, while compact resonators are too narrow banded. This study shows that a suitably stretched thin membrane backed by a slender cavity can achieve a satisfactory performance from low to medium frequencies over an octave band. The present paper focuses on the details of the modal behavior of the fully coupled membrane-cavity system, and examples are given with parameters set in a practical range. Typically, the membrane has a structure to air mass ratio of unity, and is stretched towards the elastic stress limit for a material like aluminum. The backing cavity has a depth equal to the duct height and a length five times the duct height. Three resonant peaks are found in the low to medium frequency range while the transmission loss between adjacent peaks remain above 10 dB. For the first peak, almost complete sound reflection occurs as a result of an out-of-phase combination of the first and second in vacuo modes of simply supported membranes. The second peak is solely contributed to by the first mode, while the third peak features mainly the second mode vibration. © 2002 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/156640
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.accessioned2012-08-08T08:43:20Z-
dc.date.available2012-08-08T08:43:20Z-
dc.date.issued2002en_US
dc.identifier.citationJournal Of The Acoustical Society Of America, 2002, v. 112 n. 5 I, p. 2014-2025en_US
dc.identifier.issn0001-4966en_US
dc.identifier.urihttp://hdl.handle.net/10722/156640-
dc.description.abstractLow-frequency duct noise is difficult to deal with by passive methods such as porous duct lining. Reactive methods like expansion chamber are rather bulky, while compact resonators are too narrow banded. This study shows that a suitably stretched thin membrane backed by a slender cavity can achieve a satisfactory performance from low to medium frequencies over an octave band. The present paper focuses on the details of the modal behavior of the fully coupled membrane-cavity system, and examples are given with parameters set in a practical range. Typically, the membrane has a structure to air mass ratio of unity, and is stretched towards the elastic stress limit for a material like aluminum. The backing cavity has a depth equal to the duct height and a length five times the duct height. Three resonant peaks are found in the low to medium frequency range while the transmission loss between adjacent peaks remain above 10 dB. For the first peak, almost complete sound reflection occurs as a result of an out-of-phase combination of the first and second in vacuo modes of simply supported membranes. The second peak is solely contributed to by the first mode, while the third peak features mainly the second mode vibration. © 2002 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.subject.meshModels, Theoreticalen_US
dc.subject.meshNoiseen_US
dc.subject.meshPorosityen_US
dc.titleModal analysis of a drumlike silenceren_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.doi10.1121/1.1508778en_US
dc.identifier.pmid12430813-
dc.identifier.scopuseid_2-s2.0-0036840582en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036840582&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume112en_US
dc.identifier.issue5 Ien_US
dc.identifier.spage2014en_US
dc.identifier.epage2025en_US
dc.identifier.isiWOS:000178870100027-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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