The Effects of Seamounts on Sound Propagation in Deep Water

doi:10.1088/0256-307X/32/6/064302

Chin. Phys. Lett.

2015, Vol. 32

Issue (06): 064302 DOI: 10.1088/0256-307X/32/6/064302

FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS)

The Effects of Seamounts on Sound Propagation in Deep Water

LI Wen^1,3, LI Zheng-Lin^1,2**, ZHANG Ren-He¹, QIN Ji-Xing¹, LI Jun^1,3, NAN Ming-Xing⁴

¹State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190
²Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105
³University of Chinese Academy of Sciences, Beijing 100190
⁴General Staff MET-HYD Department, Beijing 100081

Cite this article:

LI Wen, LI Zheng-Lin, ZHANG Ren-He et al 2015 Chin. Phys. Lett. 32 064302

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Abstract A propagation experiment was conducted in the South China Sea in 2014 with a flat bottom and seamounts respectively by using explosive sources. The effects of seamounts on sound propagation are analyzed by using the broadband signals. It is observed that the transmission loss (TL) decreases up to 7 dB for the signals in the first shadow zone due to the seamount reflection. Moreover, the TL might increase more than 30 dB in the converge zone due to the shadowing by seamounts. Abnormal TLs and pulse arrival structures at different ranges are explained by using the ray and wave theory. The experimental TLs and arrival pulses are compared with the numerical results and found to be in good agreement.

Received: 02 March 2015 Published: 30 June 2015

PACS:	43.30.Cq	(Ray propagation of sound in water)
	43.30.Dr	(Hybrid and asymptotic propagation theories, related experiments)
	92.10.Vz	(Underwater sound)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/6/064302 OR https://cpl.iphy.ac.cn/Y2015/V32/I06/064302

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	LI Wen
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	ZHANG Ren-He
	QIN Ji-Xing
	LI Jun
	NAN Ming-Xing

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