Higher-order acoustic diffraction by edges of finite thickness


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dc.contributor.author Chu, Dezhang
dc.contributor.author Stanton, Timothy K.
dc.contributor.author Pierce, Allan D.
dc.date.accessioned 2008-08-14T18:42:00Z
dc.date.available 2008-08-14T18:42:00Z
dc.date.issued 2007-12
dc.identifier.citation Journal of the Acoustical Society of America 122 (2007): 3177-3194 en
dc.identifier.uri http://hdl.handle.net/1912/2333
dc.description Author Posting. © Acoustical Society of America, 2007. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 122 (2007): 3177-3194, doi:10.1121/1.2783001. en
dc.description.abstract A cw solution of acoustic diffraction by a three-sided semi-infinite barrier or a double edge, where the width of the midplanar segment is finite and cannot be ignored, involving all orders of diffraction is presented. The solution is an extension of the asymptotic formulas for the double-edge second-order diffraction via amplitude and phase matching given by Pierce [A. D. Pierce, J. Acoust. Soc. Am. 55, 943–955 (1974)]. The model accounts for all orders of diffraction and is valid for all kw, where k is the acoustic wave number and w is the width of the midplanar segment and reduces to the solution of diffraction by a single knife edge as w→0. The theory is incorporated into the deformed edge solution [Stanton et al., J. Acoust. Soc. Am. 122, 3167 (2007)] to model the diffraction by a disk of finite thickness, and is compared with laboratory experiments of backscattering by elastic disks of various thicknesses and by a hard strip. It is shown that the model describes the edge diffraction reasonably well in predicting the diffraction as a function of scattering angle, edge thickness, and frequency. en
dc.description.sponsorship This work was supported by the US Office of Naval Research and by the Woods Hole Oceanographic Institution. en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Acoustical Society of America en
dc.relation.uri http://dx.doi.org/10.1121/1.2783001
dc.subject Acoustic wave diffraction en
dc.subject Acoustic wave scattering en
dc.subject Backscatter en
dc.subject Underwater sound en
dc.title Higher-order acoustic diffraction by edges of finite thickness en
dc.type Article en
dc.identifier.doi 10.1121/1.2783001

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