Comparison of Surface Duct Energy Leakage with Bottom-Bounce Energy of Close Range Propagation

doi:10.1088/0256-307X/33/10/104302

Chin. Phys. Lett.

2016, Vol. 33

Issue (10): 104302 DOI: 10.1088/0256-307X/33/10/104302

FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS)

Comparison of Surface Duct Energy Leakage with Bottom-Bounce Energy of Close Range Propagation

Cheng Chen^1,2, Kun-De Yang^1,2**, Yuan-Liang Ma^1,2, Rui Duan^1,2

¹Key Laboratory of Ocean Acoustics and Sensing (Ministry of Industry and Information Technology), Northwestern Polytechnical University, Xi'an 710072
²School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072

Cite this article:

Cheng Chen, Kun-De Yang, Yuan-Liang Ma et al 2016 Chin. Phys. Lett. 33 104302

Download: PDF(1444KB) PDF(mobile)(KB) HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks

Abstract For close range (almost 8–15 km) propagation, bottom-bounce energy (BBE) usually suffers from a great transmission loss due to a large grazing angle interacting with the ocean bottom, and the surface duct energy leakage (SDEL) might be able to make a significant contribution to shadow zone insonification. This study aims at making a comparison between SDEL and BBE in a shadow zone with a source depth of 50 m for close range propagation. Analysis of experimental data shows that for lower frequencies the SDEL can be comparable with the BBE up to a range of 12 km. Numerical simulations suggest that the transmission loss (TL) of 90 dB is a proper value to quantify the role of the SDEL in shadow zone insonification. When TL of the SDEL is about 90 dB, it is believed to be comparable with the BBE. Studies on the effect of mix layer depth (MLD) on the SDEL indicate that larger MLD and lower frequencies can help to create favorable conditions for SDEL and that there exists an optimal MLD for SDEL at certain frequency. Statistics of MLD distribution in the South China Sea (SCS) show that winter is favorable for SDEL and the situation reverses in summer. Eddies are known to occur frequently in the SCS and the study on the effect of eddies on the SDEL suggests that the presence of an eddy will influence the SDEL significantly by modifying the MLD.

Received: 26 May 2016 Published: 27 October 2016

PACS:	43.30.+m	(Underwater sound)
	92.10.Vz	(Underwater sound)

TRENDMD:

URL:

https://cpl.iphy.ac.cn/10.1088/0256-307X/33/10/104302 OR https://cpl.iphy.ac.cn/Y2016/V33/I10/104302

Service
	E-mail this article
	E-mail Alert
	RSS
Articles by authors
	Cheng Chen
	Kun-De Yang
	Yuan-Liang Ma
	Rui Duan

[1]	Labianca F M 1973 J. Acoust. Soc. Am. 53 1137
[2]	Porter M B and Jensen F B 1993 J. Acoust. Soc. Am. 94 1510
[3]	Avilov K V 2002 Acoust. Phys. 48 656
[4]	Porter M B and Bucker H P 1987 J. Acoust. Soc. Am. 82 1349
[5]	Collins M D 1993 J. Acoust. Soc. Am. 93 1736
[6]	Duan R, Yang K D and Ma Y L 2013 Chin. Phys. B 22 124301
[7]	Wang G H, Su J L and Chu P C 2003 Geophys. Res. Lett. 30 2121
[8]	Weinberg N L and Zabalgogeazcoa X 1977 J. Acoust. Soc. Am. 62 888
[9]	Henrick R F, Siegmann W L and Jacobson M J 1977 J. Acoust. Soc. Am. 62 860
[10]	Henrick R F, Jacobson M J and Siegmann W L 1980 J. Acoust. Soc. Am. 67 121
[11]	Chaigneau A, Texier M L, Eldin G and Grados C 2011 J. Geophys. Res. 116 476
[12]	Zheng G Z, Yu Z, Wei W and Rui X H 2013 Geophys. Res. Lett. 40 3677

Related articles from Frontiers Journals

[1]	Chuan-Jie Hu, Ya-Li Zeng, Yi-Neng Liu, Huan-Yang Chen. Three-Dimensional Broadband Acoustic Waveguide Cloak[J]. Chin. Phys. Lett., 2020, 37(5): 104302
[2]	Cun Wang, Shan-De Li, Wei-Guang Zheng, Qi-Bai Huang. Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber[J]. Chin. Phys. Lett., 2019, 36(4): 104302
[3]	GUO Xiao-Le, YANG Kun-De, MA Yuan-Liang, YANG Qiu-Long. Geoacoustic Inversion Based on Modal Dispersion Curve for Range-Dependent Environment[J]. Chin. Phys. Lett., 2015, 32(12): 104302
[4]	SAMCHENKO A. N., KOSHELEVA A. V., SHVYREV A. N., PIVOVAROV A. A.. Low-Frequency Hydroacoustic Experiments on the Shelf Using the Data of Geoacoustic Sediment Model[J]. Chin. Phys. Lett., 2014, 31(12): 104302
[5]	LEI Bo, MA Yuan-Liang, YANG Kun-De . Experiment Observation on Acoustic Forward Scattering for Underwater Moving Object Detection**[J]. Chin. Phys. Lett., 2011, 28(3): 104302
[6]	LI Feng-Hua, ZHANG Ren-He. Inversion for Sound Speed Profile by Using a Bottom Mounted Horizontal Line Array in Shallow Water[J]. Chin. Phys. Lett., 2010, 27(8): 104302
[7]	HU Yi, MIAO Guo-Qing, WEI Rong-Jue. Water Surface Wave in a Trough with Periodical Topographical Bottom under Vertical Vibration[J]. Chin. Phys. Lett., 2009, 26(11): 104302
[8]	JIANG Heng, ZHANG Mi-Lin, WANG Yu-Ren, HU Yan-Ping, LAN Ding, WEIBing-Chen. A Wide Band Strong Acoustic Absorption in a Locally Network Anechoic Coating[J]. Chin. Phys. Lett., 2009, 26(10): 104302
[9]	ZHAO Hong-Gang, LIU Yao-Zong, WEN Ji-Hong, YU Dian-Long, WANG Gang, WEN Xi-Sen. Sound Absorption of Locally Resonant Sonic Materials[J]. Chin. Phys. Lett., 2006, 23(8): 104302
[10]	XIAO Ling, ZHANG Ren-he, LI Feng-hua. A Novel Nonlinear Optimization Method of Inversion for Sea-Bottom Properties[J]. Chin. Phys. Lett., 1997, 14(11): 104302
[11]	QIAN Zuwen, ZHENG Xiaoyu. FURTHER INVESTIGATION ON REFLECTION AND REFRACTION OF FINITE AMPLITUDE SOUND WAVE[J]. Chin. Phys. Lett., 1990, 7(2): 104302

Viewed

Full text

Abstract