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Scattering of acoustic waves by small crustaceans

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Abstract

Features of underwater sound scattering by small crustaceans are considered. The scattering data are obtained with the use of unique instrumentation that allows one to measure quantitative scattering characteristics (backscattering cross sections and angular scattering patterns) for crustaceans of different sizes, at different frequencies (20–200 kHz) and different insonification aspects. A computational model of crustaceans is considered with allowance for both the soft tissues of the main massive part of the animal's body and the stiff armour. The model proves to be advantageous for explaining some scattering features observed in the experiments. The scattering cross sections of crustaceans measured by other researchers are presented in a unified form appropriate for comparison. Based on such a quantitative comparison, relatively simple approximate empirical formulas are proposed for estimating the backscattering cross sections of small (within several centimeters) marine crustaceans in a broad frequency range.

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Authors and Affiliations

  1. Andreev Acoustics Institute, Russian Academy of Sciences, ul. Shvernika 4, Moscow, 177036, Russia

    I. B. Andreeva & L. L. Tarasov

Authors
  1. I. B. Andreeva
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  2. L. L. Tarasov
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__________

Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 49, No. 2, 2003, pp. 156–160.

Original Russian Text Copyright © 2003 by Andreeva, Tarasov.

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Andreeva, I.B., Tarasov, L.L. Scattering of acoustic waves by small crustaceans. Acoust. Phys. 49, 125–128 (2003). https://doi.org/10.1134/1.1560372

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