Effect of random hydrodynamic inhomogeneities on low frequency sound propagation loss in shallow water |
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Authors: | A A Lunkov and V G Petnikov |
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Institution: | 1.Prokhorov General Physics Institute of the Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Low frequency (100–500 Hz) sound propagation loss on the US Atlantic continental shelf and in the Barents Sea in the presence
of stochastic surface waves, and for the US Atlantic shelf also in the presence of internal waves, is studied for the range
of up to 150 km by means of numerical simulations. Qualitative difference between sound propagation loss behavior on the US
Atlantic shelf and in the Barents Sea is demonstrated for summertime conditions even without random inhomogeneities. It is
shown that whereas internal waves have a weak effect on propagation loss, surface waves result in its considerable increase
in both areas under wintertime conditions with a wind speed of more than 9 m/s. |
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