Experimental studies of low-frequency bistatic reverberation in a shallow sea

Guzhavina, D. V.; Gulin, E. P.

doi:10.1134/1.1326720

Acoust. Phys.

2000

DOI: 10.1134/1.1326720

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Experimental studies of low-frequency bistatic reverberation in a shallow sea

D. V. Guzhavina

E. P. Gulin

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Cited by 2 publications

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Investigation of Sea Surface Effect on Shallow Water Reverberation by Coupled Mode Method

Gao

Wang

2017

J. Comp. Acous.

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The effects of rough sea surface on the long-range bottom reverberation in shallow seas are studied by the coupled mode reverberation theory. The scattering effect caused by irregular rough sea surface is described by couple coefficients. The decaying rules of long-range bottom reverberation level are simulated at different sea states, and the rough sea surface effect on the coherence of distant bottom reverberation is also discussed. It is indicated that irregular upper boundary has changed the propagation effect of the shallow water waveguide, and bottom reverberation, which is dominated among other kinds of reverberation in shallow water, is affected by the sea surface scattering as the increasing sea state. Compared with other literatures, the emphasis of this paper is to present the mechanism of rough sea surface scattering by describing the transfer of energy between different modes, and the details of energy transitions between different modes which are caused by sea surface scattering are presented for different sea states. With the increasing sea state, stronger mode coupling caused by surface scattering would affect the intensity and its space coherence of bottom reverberation obviously.

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Investigation of Sea Surface Effect on Shallow Water Reverberation by Coupled Mode Method

Gao

Wang

2017

J. Comp. Acous.

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Propagation theory for bi-static long-range bottom reverberation in shallow water waveguide

Gao¹,

Yang²,

Piao³

2012

Acta Phys. Sin.

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Bi-static long-range bottom reverberation in shallow water is investigated, and the impulse response function is derived using the linear theory of sound channel. For the case of almost layered medium, the adiabatic mode solution is introduced for the derivation of transfer function. The reverberation intensity is calculated for the range-dependent waveguide, and then both the intensities and the decaying rules are compared with their corresponding counterparts in different wedged sea areas. It is shown that the propagation effect on intensity of distant bottom reverberation can not be neglected for the bi-static active sonar in shallow water waveguide.

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Experimental studies of low-frequency bistatic reverberation in a shallow sea

Cited by 2 publications

References 7 publications

Investigation of Sea Surface Effect on Shallow Water Reverberation by Coupled Mode Method

Investigation of Sea Surface Effect on Shallow Water Reverberation by Coupled Mode Method

Propagation theory for bi-static long-range bottom reverberation in shallow water waveguide

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