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An Investigation of the Effects of Internal Waves on Sound Propagation in a Stratified Medium with a Sloping Bed

  • Ocean Acousticics. Underwater Acoustics
  • Published:
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Abstract

Internal waves usually cause temporal and spatial changes of density and consequently affect the acoustic wave propagation in the ocean. The purpose of this study is a laboratory investigation of the effects of internal waves generated by oscillation of a cylinder in a large stratified glass tank with a sloping bed on the sound waves propagation. Results showed that sound waves are affected by internal waves that depend on the slope angle to the direction of internal wave propagation angle ratio. When the ratio is subcritical or supercritical, the acoustic signal is much reduced as compared to the case with no sloped bottom. This can be explained in terms of the internal waves energy reaching the sloped bed and their reflections.

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Authors and Affiliations

  1. Iranian National Institute for Oceanography and Atmospheric Science, Tehran, Iran

    H. Deldar & V. Chegini

  2. Institute of Geophysics University of Tehran, Tehran, Iran

    A. A. Bidokhti

Authors
  1. H. Deldar
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  2. A. A. Bidokhti
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  3. V. Chegini
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Correspondence to H. Deldar.

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Deldar, H., Bidokhti, A.A. & Chegini, V. An Investigation of the Effects of Internal Waves on Sound Propagation in a Stratified Medium with a Sloping Bed. Acoust. Phys. 64, 58–63 (2018). https://doi.org/10.1134/S1063771018010049

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  • DOI: https://doi.org/10.1134/S1063771018010049

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