Piecewise coherent mode processing of acoustic data recorded on two horizontally separated vertical line arrays

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2012-05-25Author
Udovydchenkov, Ilya A.
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Brown, Michael G.
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Duda, Timothy F.
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https://hdl.handle.net/1912/5247As published
https://doi.org/10.1121/1.4722193DOI
10.1121/1.4722193Keyword
Acoustic arrays; Acoustic signal processing; Modal analysis; Underwater acoustic propagationAbstract
Motivated by measurements made in the 2004 Long-Range Ocean Acoustic Propagation Experiment (LOAPEX), the problem of mode processing transient acoustic signals collected on two nearby vertical line arrays is considered. The first three moments (centroid, variance, and skewness) of broadband distributions of acoustic energy with fixed mode number (referred to as modal group arrivals) are estimated. It is shown that despite the absence of signal coherence between the two arrays and poor high mode number energy resolution, the centroid and variance of these distributions can be estimated with tolerable errors using piecewise coherent mode processing as described in this paper.
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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): EL492-EL498, doi:10.1121/1.4722193.
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Journal of the Acoustical Society of America 131 (2012): EL492-EL498Related items
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