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Article: Measurement of in-duct acoustic properties by using a single microphone with fixed position

TitleMeasurement of in-duct acoustic properties by using a single microphone with fixed position
Authors
Issue Date2004
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, 2004, v. 116 n. 6, p. 3498-3504 How to Cite?
AbstractAcoustic properties of sound absorption materials and other acoustic structures can be measured in an impedance tube using the well-established two-microphone method to resolve the two traveling wave components of a standing wave pattern. The accuracy of such measurements depends crucially on the calibration of the two microphones placed in close proximity. To eliminate such calibration, the one-microphone method [Chu, J. Acoust. Soc. Am. 80, 555-560 (1986)] uses the same microphone to probe at two positions sequentially using the voltage driving the loudspeaker as a reference signal. A variant of this method is introduced in this study in which the microphone is fixed at one position while a rigid end plate moves between two positions to resolve the standing wave. The sound source is installed as a side branch, and its driving signal is also used as a reference in the two-step measurement. Close agreement is found with the established two-microphone method, and factors which might affect the accuracy of the new technique are discussed. As a demonstration of the robustness of the method, a low-budget electret microphone is used and the result also matches well with those obtained by the two-microphone method with high-quality condenser type microphones. © 2004 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/156727
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.accessioned2012-08-08T08:43:43Z-
dc.date.available2012-08-08T08:43:43Z-
dc.date.issued2004en_US
dc.identifier.citationJournal Of The Acoustical Society Of America, 2004, v. 116 n. 6, p. 3498-3504en_US
dc.identifier.issn0001-4966en_US
dc.identifier.urihttp://hdl.handle.net/10722/156727-
dc.description.abstractAcoustic properties of sound absorption materials and other acoustic structures can be measured in an impedance tube using the well-established two-microphone method to resolve the two traveling wave components of a standing wave pattern. The accuracy of such measurements depends crucially on the calibration of the two microphones placed in close proximity. To eliminate such calibration, the one-microphone method [Chu, J. Acoust. Soc. Am. 80, 555-560 (1986)] uses the same microphone to probe at two positions sequentially using the voltage driving the loudspeaker as a reference signal. A variant of this method is introduced in this study in which the microphone is fixed at one position while a rigid end plate moves between two positions to resolve the standing wave. The sound source is installed as a side branch, and its driving signal is also used as a reference in the two-step measurement. Close agreement is found with the established two-microphone method, and factors which might affect the accuracy of the new technique are discussed. As a demonstration of the robustness of the method, a low-budget electret microphone is used and the result also matches well with those obtained by the two-microphone method with high-quality condenser type microphones. © 2004 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.titleMeasurement of in-duct acoustic properties by using a single microphone with fixed positionen_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.doi10.1121/1.1811476en_US
dc.identifier.scopuseid_2-s2.0-11144322852en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-11144322852&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume116en_US
dc.identifier.issue6en_US
dc.identifier.spage3498en_US
dc.identifier.epage3504en_US
dc.identifier.isiWOS:000225914400027-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChoy, YS=7004920275en_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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