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    Aspects of modelling coherent acoustic reflection from a rough seafloor

    Access Status
    Fulltext not available
    Authors
    Jones, Adrian
    Bartel, D.
    Duncan, Alec
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Jones, A. and Bartel, D. and Duncan, A. 2016. Aspects of modelling coherent acoustic reflection from a rough seafloor, pp. 484-492.
    Source Title
    2nd Australasian Acoustical Societies Conference, ACOUSTICS 2016
    ISBN
    9781510837393
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/55976
    Collection
    • Curtin Research Publications
    Abstract

    Acoustic energy incident at a roughened seafloor will result in a component scattered back into the water at non-specular angles, a component reflected coherently at the specular angle, and both coherent and incoherent components being transmitted into, and absorbed within, the seafloor. An initial expectation was that the total coherent reflection loss might be approximated by a combination of the loss attributed to a flat seafloor based on its geoacoustic properties, and the separate coherent loss due to the roughness scattering described for a perfectly reflecting surface. This hypothesis had been verified in limited earlier work, by comparing loss values obtained using this simple addition of model outputs with loss values obtained using the perturbation approach for rough surface scattering from stratified media described by Kuperman and Schmidt (JASA, 86, Oct. 1989). In new work, data obtained using Monte Carlo Parabolic Equation (PE) transmission simulations have been used as an added reference for further verification of the hypothesis.

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