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Article: Surface impedance design with ground corrugation for mitigation of large-calibre gun blast noise

TitleSurface impedance design with ground corrugation for mitigation of large-calibre gun blast noise
Authors
Issue Date2008
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/17455030.asp
Citation
Waves In Random And Complex Media, 2008, v. 18 n. 3, p. 461-477 How to Cite?
AbstractThe surface impedance design approach is proposed for mitigating large-calibre gun blast noise. Surrounding the blast noise, we employ a group of concentric trenches with critical depths to dampen the propagation of the acoustic wave. These trenches behave like quarter-wavelength resonators and produce acoustic soft surfaces at their openings. The sound pressure is then mitigated over these soft surfaces by destructive interference and the wave attenuates rapidly along the ground surface. To evaluate the overall acoustic performance of such a design, we develop an efficient numerical solver by treating the geometry as a body of revolution (BOR). The symmetry of the structure in the revolution direction allows the 3D boundary integral equation (BIE) for acoustic wave scattering to be reduced to a 2D integral equation by the use of Fourier series expansions. Numerical experiments show that this model can effectively suppress the acoustic wave propagation horizontally and the reduction can reach about 15 dB for large-calibre gun noise with very low-frequency components.
Persistent Identifierhttp://hdl.handle.net/10722/182748
ISSN
2015 Impact Factor: 1.061
2015 SCImago Journal Rankings: 0.578
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTong, MSen_US
dc.contributor.authorChew, WCen_US
dc.contributor.authorWhite, MJen_US
dc.date.accessioned2013-05-02T05:16:41Z-
dc.date.available2013-05-02T05:16:41Z-
dc.date.issued2008en_US
dc.identifier.citationWaves In Random And Complex Media, 2008, v. 18 n. 3, p. 461-477en_US
dc.identifier.issn1745-5030en_US
dc.identifier.urihttp://hdl.handle.net/10722/182748-
dc.description.abstractThe surface impedance design approach is proposed for mitigating large-calibre gun blast noise. Surrounding the blast noise, we employ a group of concentric trenches with critical depths to dampen the propagation of the acoustic wave. These trenches behave like quarter-wavelength resonators and produce acoustic soft surfaces at their openings. The sound pressure is then mitigated over these soft surfaces by destructive interference and the wave attenuates rapidly along the ground surface. To evaluate the overall acoustic performance of such a design, we develop an efficient numerical solver by treating the geometry as a body of revolution (BOR). The symmetry of the structure in the revolution direction allows the 3D boundary integral equation (BIE) for acoustic wave scattering to be reduced to a 2D integral equation by the use of Fourier series expansions. Numerical experiments show that this model can effectively suppress the acoustic wave propagation horizontally and the reduction can reach about 15 dB for large-calibre gun noise with very low-frequency components.en_US
dc.languageengen_US
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/17455030.aspen_US
dc.relation.ispartofWaves in Random and Complex Mediaen_US
dc.titleSurface impedance design with ground corrugation for mitigation of large-calibre gun blast noiseen_US
dc.typeArticleen_US
dc.identifier.emailChew, WC: wcchew@hku.hken_US
dc.identifier.authorityChew, WC=rp00656en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1080/17455030802078437en_US
dc.identifier.scopuseid_2-s2.0-47649097485en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-47649097485&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume18en_US
dc.identifier.issue3en_US
dc.identifier.spage461en_US
dc.identifier.epage477en_US
dc.identifier.isiWOS:000257738300007-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridTong, MS=11839685700en_US
dc.identifier.scopusauthoridChew, WC=36014436300en_US
dc.identifier.scopusauthoridWhite, MJ=55472872700en_US

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