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Approximate analytic representations of laws of attenuation in vector-scalar fields of multipole sources in a Pekeris waveguide

  • Ocean Acoustics. Hydroacoustics
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Abstract

We obtain, and compare with exact solutions, the approximate analytic relations that determine, for increasing distance, irregularities of attenuation in the regular sound pressure components and orthogonal projections of the oscillation velocity vectors of low-frequency signals formed in a waveguide by various multipoles. We show that the mentioned field characteristics essentially depend on the type of multipole, the distance between the source and receivers, and the specific features of the received scalar or vector field components. It is established that the approximating dependences agree well with the exact laws of attenuation in the field and, despite the variety of dependences, they are divided into three compact groups with uniform characteristics.

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Correspondence to G. N. Kuznetsov.

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Original Russian Text © G.N. Kuznetsov, A.N. Stepanov, 2017, published in Akusticheskii Zhurnal, 2017, Vol. 63, No. 6, pp. 623–636.

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Kuznetsov, G.N., Stepanov, A.N. Approximate analytic representations of laws of attenuation in vector-scalar fields of multipole sources in a Pekeris waveguide. Acoust. Phys. 63, 660–672 (2017). https://doi.org/10.1134/S1063771017060082

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