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Determining the effective parameters of a Shallow-Water bottom from wideband signal spectra under conditions of hydrodynamic variability

  • Ocean Acoustics. Hydroacoustics
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Abstract

We propose a method for determining the effective parameters of the upper marine sediment layer on extended tracks from the spectra of wideband signals in conditions of hydrodynamic variability. As an example, we consider the Shallow Water 2006 experiment on the Atlantic shelf of the United States, which used signals with a band of 300 ± 30 Hz received by a vertical array. The length of the track was ~20 km at a sea depth of ~80 m. Frequency-mode analysis of the received signals showed that spatiotemporal fluctuations of the wave medium lead to random changes in mode amplitudes while retaining the relative stability of the mode phase difference. This is the basis of the proposed method, which makes it possible to determine the track-averaged values of the sound velocity in the bottom and density of the bottom under conditions of hydrodynamic variability.

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Authors and Affiliations

  1. Voronezh State University, Universitetskya pl. 1, Voronezh, 394006, Russia

    V. A. Grigor’ev

  2. L. Charney School of Marine Sciences, University of Haifa Mount Carmel, Haifa, 31905, Israel

    B. G. Katsnel’son

  3. Woods Hole Oceanographic Institution Woods Hole, New York, MA, 02543, USA

    J. F. Lynch

Authors
  1. V. A. Grigor’ev
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  2. B. G. Katsnel’son
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  3. J. F. Lynch
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Corresponding author

Correspondence to V. A. Grigor’ev.

Additional information

Original Russian Text © V.A. Grigor’ev, B.G. Katsnel’son, J.F. Lynch, 2016, published in Akusticheskii Zhurnal, 2016, Vol. 62, No. 3, pp. 330–340.

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Grigor’ev, V.A., Katsnel’son, B.G. & Lynch, J.F. Determining the effective parameters of a Shallow-Water bottom from wideband signal spectra under conditions of hydrodynamic variability. Acoust. Phys. 62, 339–349 (2016). https://doi.org/10.1134/S1063771016030076

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  • DOI: https://doi.org/10.1134/S1063771016030076

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