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Accession Number ADA571649
Title Effects of Sand Sediment Volume Heterogeneities on Sound Propagation and Scattering.
Publication Date Sep 2011
Media Count 7p
Personal Author B. T. Hefner
Abstract To model the effects of volume heterogeneities in: (1) scattering from sand sediments; and (2) in sound propagation within those sediments. A better understanding of the role of heterogeneities in both scattering and propagation could lead to improvements in sediment characterization using remote sensing techniques as well as in high-frequency detection of mine and mine-like targets resting on or buried within the seafloor. The goal of this work is to further develop and test models of volume scattering by utilizing the existing suite of instrumentation previously developed at APL-UW for the study of high-frequency acoustics. These models include perturbation models applied to scattering from the seafloor due to heterogeneities in the sediment properties, recently developed models by Dr. Ivakin, which model scattering from inclusions in the sediment such as shells and coarse grains, models which account for the transition layer observed during SAX99 which could have a strong effect on volume scattering at high frequencies, and perturbation theory for sound propagation through a varying poroelastic sediment.
Keywords Acoustic scattering
Buried objects
High frequency
Mine detection
Ocean bottom
Sound transmission

Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
46A - Acoustics
Corporate Author Washington Univ., Seattle. Applied Physics Lab.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1316
Contract Number N00014-10-1-0089

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