阿拉伯海季节声速变化对信号探测距离影响的实验研究

IF 0.8 4区工程技术 Q3 MULTIDISCIPLINARY SCIENCES

Defence Science Journal Pub Date : 2022-08-26 DOI:10.14429/dsj.72.17756

Elizabeth Shani N X, Nimmi R Nair, R. Raju, S. R

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引用次数: 1

摘要

研究了信号探测距离(SDR)相对于测量噪声级和声速的时间变异性。利用包含水深变化的N × 2D声学模型研究了阿拉伯海某区域的探测距离。在不同的接收机深度下，测定了500 Hz范围内的方位角和季节SDR。研究表明，声速剖面的季节变化导致了该区域冬季较高的SDR和噪声水平。研究还证实，检测范围的显著季节性差异对应于截止频率为160 Hz。在40米深度的接收器的探测范围被观察到在整个方位角和研究季节都很高。

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Experimental Study on the Impact of Seasonal Sound Speed Variability on Signal Detection Range in Arabian Sea

Temporal variability of Signal Detection Range (SDR) with respect to measured noise level and sound speed is examined. An N x 2D acoustic model which included bathymetric variations, was used to study detection ranges for an area in Arabian Sea. Azimuthal and seasonal SDR at octave bands within 500 Hz were determined at different receiver depths. Study shows that seasonal change in sound speed profile resulted in high SDR and noise level in winter at the location. Study also confirms the significant seasonal difference in detection range corresponds to the cut off frequency at 160 Hz. Detection range for a receiver at a depth 40 m is observed to be high across the azimuth and seasons of study.

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来源期刊

Defence Science Journal 综合性期刊-综合性期刊

CiteScore

1.80

自引率

11.10%

发文量

审稿时长

7.5 months

期刊介绍： Defence Science Journal is a peer-reviewed, multidisciplinary research journal in the area of defence science and technology. Journal feature recent progresses made in the field of defence/military support system and new findings/breakthroughs, etc. Major subject fields covered include: aeronautics, armaments, combat vehicles and engineering, biomedical sciences, computer sciences, electronics, material sciences, missiles, naval systems, etc.