Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6909
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dc.contributorDepartment of Mechanical Engineering-
dc.creatorWang, X-
dc.creatorChoy, YS-
dc.creatorCheng, L-
dc.date.accessioned2014-12-11T08:23:49Z-
dc.date.available2014-12-11T08:23:49Z-
dc.identifier.isbn978-962-367-732-5-
dc.identifier.urihttp://hdl.handle.net/10397/6909-
dc.language.isoenen_US
dc.publisherDepartment of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.en_US
dc.rightsCopyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic Universityen_US
dc.rightsPosted with permission of the publisher.en_US
dc.subjectPlate silenceren_US
dc.subjectMicro-perforationen_US
dc.subjectModal analysisen_US
dc.titleHybrid passive noise control on a plate silencer with micro-perforationsen_US
dc.typeConference Paperen_US
dc.description.otherinformationAuthor name used in this publication: Y. S. Choyen_US
dc.description.otherinformationAuthor name used in this publication: Li Chengen_US
dc.description.otherinformationRefereed conference paperen_US
dcterms.abstractA theoretical study has been carried out for investigating the use of micro-perforation in the plate silencer. A plate silencer consists of two side-branch, rectangular cavities covered by plates. Previous study showed that if properly selecting the parameters of the plate, there would be three resonant peaks in the low to medium frequency range and the transmission loss (TL) between adjacent peaks remained above 10 dB. Modal analysis pointed out that the first two vibration modes of plate in vacuo play the important roles in reflecting sound, and the peaks of TL are contributed by different combinations of the first two modes. Besides, an optimal performance requires a high bending stiffness of the plate which helps lifting the dip between 2nd and 3rd peak of the TL to achieve a broad bandwidth. This study introduces absorption by adding micro-perforation into the plate. By combining the reflection and absorption. this research aims at achieving a wider stopband. Theoretical model has been established and the vibro-acoustic coupling mechanism between the micro-perforation plate, the duct and the cavity has been investigated. It is found that the micro-perforation is beneficial for releasing the bending stiffness and widening the stop band by 20%.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationDynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 2, p. 795-802-
dcterms.issued2011-12-
dc.relation.ispartofbookDynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong-
dc.identifier.rosgroupidr57749-
dc.description.ros2011-2012 > Academic research: refereed > Refereed conference paper-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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