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Orientation dependence of broadband acoustic backscattering from live squid

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dc.contributor.author Lee, Wu-Jung
dc.contributor.author Lavery, Andone C.
dc.contributor.author Stanton, Timothy K.
dc.date.accessioned 2012-06-26T18:40:45Z
dc.date.available 2012-06-26T18:40:45Z
dc.date.issued 2012-06
dc.identifier.citation Journal of the Acoustical Society of America 131 (2012): 4461-4475 en_US
dc.identifier.uri http://hdl.handle.net/1912/5244
dc.description Author Posting. © Acoustical Society of America, 2012. 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 131 (2012): 4461-4475, doi:10.1121/1.3701876. en_US
dc.description.abstract A controlled laboratory experiment of broadband acoustic backscattering from live squid (Loligo pealeii) was conducted using linear chirp signals (60–103 kHz) with data collected over the full 360° of orientation in the lateral plane, in <1° increments. The acoustic measurements were compared with an analytical prolate spheroid model and a three-dimensional numerical model with randomized squid shape, both based on the distorted-wave Born approximation formulation. The data were consistent with the hypothesized fluid-like scattering properties of squid. The contributions from the front and back interfaces of the squid were found to dominate the scattering at normal incidence, while the arms had a significant effect at other angles. The three-dimensional numerical model predictions out-performed the prolate spheroid model over a wide range of orientations. The predictions were found to be sensitive to the shape parameters, including the arms and the fins. Accurate predictions require setting these shape parameters to best describe the most probable squid shape for different applications. The understanding developed here serves as a basis for the accurate interpretation of in situ acoustic scattering measurements of squid. en_US
dc.description.sponsorship Funding for this research was provided by the Taiwan Merit Scholarship (NSC-095-SAF-I-564-021-TMS) and the Academic Program Office at WHOI. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher Acoustical Society of America en_US
dc.relation.uri http://dx.doi.org/10.1121/1.3701876
dc.subject Acoustic signal processing en_US
dc.subject Acoustic variables measurement en_US
dc.subject Acoustic wave scattering en_US
dc.subject Backscatter en_US
dc.subject Numerical analysis en_US
dc.title Orientation dependence of broadband acoustic backscattering from live squid en_US
dc.type Article en_US
dc.identifier.doi 10.1121/1.3701876


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