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dc.contributor.authorStephen, Ralph A.
dc.contributor.authorSwift, Stephen A.
dc.date.accessioned2008-10-14T18:21:21Z
dc.date.available2008-10-14T18:21:21Z
dc.date.issued1994-08
dc.identifier.citationJournal of the Acoustical Society of America 96 (1994): 973-990en
dc.identifier.urihttp://hdl.handle.net/1912/2494
dc.descriptionAuthor Posting. © Acoustical Society of America, 1994. 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 96 (1994): 973-990, doi:10.1121/1.410271.en
dc.description.abstractA numerical scattering chamber (NSC) has been developed to compute backscatter functions for geologically realistic seafloor models. In the NSC, solutions are computed to the elastic (or anelastic) wave equation by the finite-difference method. This has the following advantages: (a) It includes all rigidity effects in the bottom including body and interface waves. (b) It can be applied to pulse beams at low grazing angles. (c) Both forward scatter and backscatter are included. (d) Multiple interactions between scatterers are included. (e) Arbitrary, range-dependent topography and volume heterogeneity can be treated simultaneously. (f) Problems are scaled to wavelengths and periods so that the results are applicable to a wide range of frequencies. (g) The method considers scattering from structures with length scales on the order of acoustic wavelengths. The process is discussed for two examples: a single facet on a flat, homogeneous seafloor and a canonically rough, homogeneous seafloor. Representing the backscattered field by a single, angle-dependent coefficient is an oversimplification. In a strong scattering environment, time spread of the field is a significant issue and an angle-dependent separation of the wave field may not be valid.en
dc.description.sponsorshipThis work was carried out under support from the Office of Naval Research Acoustic Reverberation Special Research (Grant Number N00014-90-J-1493en
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.publisherAcoustical Society of Americaen
dc.relation.urihttps://doi.org/10.1121/1.410271
dc.subjectSea beden
dc.subjectSound wavesen
dc.subjectBackscatteringen
dc.subjectFinite difference methoden
dc.subjectRoughnessen
dc.subjectWave equationsen
dc.titleModeling seafloor geoacoustic interaction with a numerical scattering chamberen
dc.typeArticleen
dc.identifier.doi10.1121/1.410271


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