Sound Propagation in Shallow Water with an Inhomogeneous GAS-Saturated Bottom


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We present the methods and results of numerical experiments studying the low-frequency sound propagation in one of the areas of the Arctic shelf with a randomly inhomogeneous gas-saturated bottom. The characteristics of the upper layer of bottom sedimentary rocks (sediments) used in calculations were obtained during a 3D seismic survey and trial drilling of the seafloor. We demonstrate the possibilities of substituting in numerical simulation a real bottom with a fluid homogeneous half-space where the effective value of the sound speed is equal to the average sound speed in the bottom, with averaging along the sound propagation path to a sediment depth of 0.6 wavelength in the bottom. An original technique is proposed for estimating the sound speed propagation in an upper inhomogeneous sediment layer. The technique is based on measurements of acoustic wave attenuation in water during waveguide propagation.

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V. Grigor’ev

Voronezh State University

编辑信件的主要联系方式.
Email: grig4@yandex.ru
俄罗斯联邦, Voronezh, 394018

V. Petnikov

Prokhorov General Physics Institute

Email: grig4@yandex.ru
俄罗斯联邦, Moscow, 119991

A. Roslyakov

Faculty of Geology

Email: grig4@yandex.ru
俄罗斯联邦, Moscow, 119992

Ya. Terekhina

Faculty of Geology

Email: grig4@yandex.ru
俄罗斯联邦, Moscow, 119992

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