Robustness of Holographic Processing of Hydroacoustic Signals in the Presence of Intense Internal Waves

IF 1.1 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Physics of Wave Phenomena Pub Date : 2023-10-16 DOI:10.3103/S1541308X23050059

V. M. Kuz’kin, S. A. Pereselkov, M. Badiey, N. V. Ladykin, A. Yu. Malykhin, S. A. Tkachenko

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Abstract

The robustness of the holographic processing of hydroacoustic broadband signals with respect to the spatial and temporal inhomogeneities of the ocean medium has been experimentally studied. The experiment was performed in shallow water against the background of intense internal waves (IIWs). The sound source was a towed pneumatic emitter; a single hydrophone played the role of a receiver. The interference patterns and holograms of sound pressure for different instants, when a perturbation of the medium caused horizontal refraction or coupling of acoustic field modes, are presented. It is shown that, in the presence of IIWs (which perturb the source field), holographic processing makes it possible to separate the spectral densities of unperturbed and perturbed fields. This circumstance allows one to reconstruct the hologram and interference pattern of unperturbed source field, thus demonstrating the robustness of holographic processing of hydroacoustic signals in the presence of hydrodynamic perturbations.

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存在强内波时水声信号全息处理的稳健性

实验研究了水声宽带信号全息处理相对于海洋介质的空间和时间不均匀性的稳健性。实验是在强烈内波（IIW）背景下在浅水中进行的。声源是一个拖曳式气动发射器；一个水听器起到了接收器的作用。给出了介质扰动引起水平折射或声场模式耦合时不同时刻声压的干涉图和全息图。研究表明，在存在IIW（扰动源场）的情况下，全息处理使分离未扰动场和扰动场的光谱密度成为可能。这种情况允许重建未受扰动源场的全息图和干涉图案，从而证明了在存在流体动力学扰动的情况下对水声信号进行全息处理的稳健性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of Wave Phenomena PHYSICS, MULTIDISCIPLINARY-

CiteScore

2.50

自引率

21.40%

发文量

审稿时长

>12 weeks

期刊介绍： Physics of Wave Phenomena publishes original contributions in general and nonlinear wave theory, original experimental results in optics, acoustics and radiophysics. The fields of physics represented in this journal include nonlinear optics, acoustics, and radiophysics; nonlinear effects of any nature including nonlinear dynamics and chaos; phase transitions including light- and sound-induced; laser physics; optical and other spectroscopies; new instruments, methods, and measurements of wave and oscillatory processes; remote sensing of waves in natural media; wave interactions in biophysics, econophysics and other cross-disciplinary areas.