Studies of Spatiotemporal Structure of the Acoustic Field Formed in Deep Water by a Broadband Pulsed Signal Source on the Shelf of the Sea of Japan

Morgunov, Yu. N.; Golov, A. A.; Буренин, А. В.; Petrov, P. S.

doi:10.1134/s1063771019050166

Cited by 14 publications

(2 citation statements)

References 13 publications

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“…Usually, multiple scattering of acoustic signals causes phase and amplitude fluctuations and complicates interference pattern and dispersion characteristics [1]. This process acts as an obstacle preventing the application of acoustic methods to solving various practical problems in marine science, e.g., underwater communication and navigation [2][3][4][5], or hydroacoustical tomography [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Random Matrix Theory for Sound Propagation in a Shallow-Water Acoustic Waveguide with Sea Bottom Roughness

Makarov,

Petrov,

Uleysky

2023

JMSE

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The problem of sound propagation in a shallow sea with a rough sea bottom is considered. A random matrix approach for studying sound scattering by the water–bottom interface inhomogeneities is developed. This approach is based on the construction of a statistical ensemble of the propagator matrices that describe the evolution of the wavefield in the basis of normal modes. A formula for the coupling term corresponding to inter-mode transitions due to scattering by the sea bottom is derived. The Weisskopf–Wigner approximation is utilized for the coupling between waterborne and sediment modes. A model of a waveguide with the bottom roughness described by the stochastic Ornstein–Uhlenbeck process is considered as an example. Range dependencies of mode energies, modal cross coherences and scintillation indices are computed using Monte Carlo simulations. It is shown that decreasing the roughness correlation length enhances mode coupling and facilitates sound scattering.

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Section: Introductionmentioning

confidence: 99%

Random Matrix Theory for Sound Propagation in a Shallow-Water Acoustic Waveguide with Sea Bottom Roughness

Makarov,

Petrov,

Uleysky

2023

JMSE

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“…For the effective implementation of acoustic thermometry in the northern latitudes, methods were proposed and tested with acoustic sources mounted on the shelf [12][13][14][15]. One of the main fundamental scientific results determining the concept of developing acoustic thermometry tools is the application of the acoustic "mudslide" effect.…”

Section: Introductionmentioning

confidence: 99%

Pilot Acoustic Tomography Experiment in the Sea of Japan at 1073 km Distance

Долгих

Morgunov

Golov

et al. 2023

JMSE

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This article discusses the results obtained from performing a test acoustic-hydrological experiment in August 2022 at a marine test site from the coast of Sakhalin Island to the Kita-Yamato Bank in the Sea of Japan. A methodology for preliminary studies in the water area is presented. It is designed to study the climatic variability of the temperature regimes of the aquatic environment based on numerical modeling using the RAY computer program and the NEMO ocean hydrodynamic circulation model. One of the main results is the value of the average temperature of the marine environment calculated with high accuracy on the axis of the underwater sound channel in the Sea of Japan on a thousand-kilometer acoustic path when crossing the vortex system. The appearance of the measuring system, technical means, and methods described in the article can be used as the basis for organizing high-precision operational monitoring of thermodynamic processes in extended marine areas.

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Features of the Formation of the Pulse Characteristics of Waveguides by the Long-Range Propagation of Acoustic Signals in Underwater Sound Channels

et al. 2021

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Studies of Spatiotemporal Structure of the Acoustic Field Formed in Deep Water by a Broadband Pulsed Signal Source on the Shelf of the Sea of Japan

Cited by 14 publications

References 13 publications

Random Matrix Theory for Sound Propagation in a Shallow-Water Acoustic Waveguide with Sea Bottom Roughness

Random Matrix Theory for Sound Propagation in a Shallow-Water Acoustic Waveguide with Sea Bottom Roughness

Pilot Acoustic Tomography Experiment in the Sea of Japan at 1073 km Distance

Features of the Formation of the Pulse Characteristics of Waveguides by the Long-Range Propagation of Acoustic Signals in Underwater Sound Channels

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