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dc.contributor.authorFoote, Kenneth G.
dc.contributor.authorFrancis, David T. I.
dc.date.accessioned2007-07-02T11:25:25Z
dc.date.issued2002
dc.identifier.urihttp://hdl.handle.net/11250/107953
dc.descriptionJournal home page: http://scitation.aip.org/jasa/
dc.description.abstractTo establish the validity of the boundary-element method (BEM) for modeling scattering by swimbladder-bearing fish, the BEM is exercised in several ways. In a computation of backscattering by a 50-mm-diam spherical void in sea water at the four frequencies 38.1, 49.6, 68.4, and 120.4 kHz, agreement with the analytical solution is excellent. In computations of target strength as a function of tilt angle for each of 15 surface-adapted gadoids for which the swimbladders were earlier mapped, BEM results are in close agreement with Kirchhoff-approximation-model results at each of the same four frequencies. When averaged with respect to various tilt angle distributions and combined by regression analysis, the two models yield similar results. Comparisons with corresponding values derived from measured target strength functions of the same 15 gadoid specimens are fair, especially for the tilt angle distribution with the greatest standard deviation, namely 16°.en
dc.format.extent153153 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoengen
dc.subjectswimbladdered fishen
dc.subjectgadoidsen
dc.titleComparing Kirchhoff-approximation and boundary-element models for computing gadoid target strengthsen
dc.typeJournal articleen
dc.typePeer reviewed
dc.source.pagenumber1644-1654en
dc.source.volume111en
dc.source.journalThe Journal of the Acoustical Society of Americaen
dc.source.issue4en
dc.identifier.doihttp://dx.doi.org/10.1121/1.1458939


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