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Depth interference in the deep ocean with application to underwater source localization
Chengzhen He1,2, Lianghao Guo1,2, Weiyu Zhang1,2
1State Key Laboratory of Acoustics and Marine Information, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
None:
In the deep sea, line spectra in target radiated noise often possess a higher signal-to-noise ratio than broadband components. This makes narrowband localization a valuable complement when broadband methods fail. Utilizing a near-bottom vertical array in the deep-sea direct-arrival zone reveals a distinct depth-dependent interference structure. This paper analyzes the variation patterns of two key interference depth intervals with receiver depth, source range, and source depth. Based on this variation pattern, a localization method suitable for narrowband stationary sound sources was proposed, and its effectiveness was verified through simulation and experimental data.
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