Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33118
DC FieldValueLanguage
dc.contributorDepartment of Mechanical Engineering-
dc.creatorChoy, YS-
dc.creatorHuang, L-
dc.date.accessioned2015-06-23T09:13:57Z-
dc.date.available2015-06-23T09:13:57Z-
dc.identifier.issn0001-4966-
dc.identifier.urihttp://hdl.handle.net/10397/33118-
dc.language.isoenen_US
dc.publisherAcoustical Society of Americaen_US
dc.titleMeasurement of in-duct acoustic properties by using a single microphone with fixed positionen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage3498-
dc.identifier.epage3504-
dc.identifier.volume116-
dc.identifier.issue6-
dc.identifier.doi10.1121/1.1811476-
dcterms.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.-
dcterms.bibliographicCitationJournal of the Acoustical Society of America, 2004, v. 116, no. 6, p. 3498-3504-
dcterms.isPartOfJournal of the Acoustical Society of America-
dcterms.issued2004-
dc.identifier.isiWOS:000225914400027-
dc.identifier.scopus2-s2.0-11144322852-
dc.identifier.eissn1520-8524-
dc.identifier.rosgroupidr21068-
dc.description.ros2004-2005 > Academic research: refereed > Publication in refereed journal-
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