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    Variability of phase and amplitude fronts due to horizontal refraction in shallow water

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    1.5020274.pdf (710.5Kb)
    Date
    2018-01-16
    Author
    Katsnelson, Boris G.  Concept link
    Grigorev, Valery A.  Concept link
    Lynch, James F.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/9568
    As published
    https://doi.org/10.1121/1.5020274
    DOI
    10.1121/1.5020274
    Abstract
    The variability of the interference pattern of a narrow-band sound signal in a shallow water waveguide in the horizontal plane in the presence of horizontal stratification, in particular due to linear internal waves, is studied. It is shown that lines of constant phase (a phase front) and lines of constant amplitude/envelope (an amplitude front) for each waveguide mode may have different directions in the spatial vicinity of the point of reception. The angle between them depends on the waveguide's parameters, the mode number, and the sound frequency. Theoretical estimates and data processing methodology for obtaining these angles from experimental data recorded by a horizontal line array are proposed. The behavior of the angles, which are obtained for two episodes from the Shallow Water 2006 (SW06) experiment, show agreement with the theory presented.
    Description
    Author Posting. © Acoustical Society of America, 2018. 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 143 (2018): 193-201, doi:10.1121/1.5020274.
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    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of the Acoustical Society of America 143 (2018): 193-201
     
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