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Invariance of the Effective Phase Velocity of a Hydroacoustic Field in the Deep Ocean

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Abstract

The distribution of sound pressure and phase gradients is studied in the deep sea along the signal-propagation paths in the near illumination zone (NIZ) and the far illumination zone (FIZ), as well as in the shadow zone (SZ). It is shown that the characteristics of the field formed by the leaking, captured, and water modes differ significantly. It is established that the phase gradients and the dependences of the “effective phase velocity” (EPV) on the distance in the SZ are stable and determined by a single invariant regularity. An analytical description of this dependence is proposed. It is also found that the value of the EPV in the zones with dominant water modes is close to the average sound velocity in the waveguide.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, 117942, Moscow, Russia

    S. P. Aksenov & G. N. Kuznetsov

Authors
  1. S. P. Aksenov
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  2. G. N. Kuznetsov
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Correspondence to G. N. Kuznetsov.

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Translated by V. Bukhanov

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Aksenov, S.P., Kuznetsov, G.N. Invariance of the Effective Phase Velocity of a Hydroacoustic Field in the Deep Ocean. Dokl. Phys. 65, 261–264 (2020). https://doi.org/10.1134/S1028335820050043

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  • DOI: https://doi.org/10.1134/S1028335820050043

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