Spatial correlation of the high intensity zone in deep-water acoustic field

doi:10.1088/1674-1056/25/12/124310

中国物理B ›› 2016, Vol. 25 ›› Issue (12): 124310-124310.doi: 10.1088/1674-1056/25/12/124310

• SPECIAL TOPIC—Acoustics • 上一篇下一篇

Spatial correlation of the high intensity zone in deep-water acoustic field

Jun Li(李鋆), Zheng-Lin Li(李整林), Yun Ren(任云)

1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100190, China;
3. Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105, China

收稿日期:2016-06-07 修回日期:2016-08-11 出版日期:2016-12-05 发布日期:2016-12-05
通讯作者: Zheng-Lin Li E-mail:lzhl@mail.ioa.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11434012 and 41561144006).

Spatial correlation of the high intensity zone in deep-water acoustic field

Jun Li(李鋆)^1,2, Zheng-Lin Li(李整林)^1,3, Yun Ren(任云)¹

1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100190, China;
3. Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105, China

Received:2016-06-07 Revised:2016-08-11 Online:2016-12-05 Published:2016-12-05
Contact: Zheng-Lin Li E-mail:lzhl@mail.ioa.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11434012 and 41561144006).

摘要/Abstract

摘要：

The spatial correlations of acoustic field have important implications for underwater target detection and other applications in deep water. In this paper, the spatial correlations of the high intensity zone in the deep-water acoustic field are investigated by using the experimental data obtained in the South China Sea. The experimental results show that the structures of the spatial correlation coefficient at different ranges and depths are similar to the transmission loss structure in deep water. The main reason for this phenomenon is analyzed by combining the normal mode theory with the ray theory. It is shown that the received signals in the high intensity zone mainly include one or two main pulses which are contributed by the interference of a group of waterborne modes with similar phases. The horizontal-longitudinal correlations at the same receiver depth but in different high intensity zones are analyzed. At some positions, more pulses are received in the arrival structure of the signal due to bottom reflection and the horizontal-longitudinal correlation coefficient decreases accordingly. The multi-path arrival structure of receiving signal becomes more complex with increasing receiver depth.

关键词: spatial correlations, deep water, high intensity zone, normal mode

Abstract:

Key words: spatial correlations, deep water, high intensity zone, normal mode

中图分类号: (Normal mode propagation of sound in water)

43.30.Bp

43.30.Re (Signal coherence or fluctuation due to sound propagation/scattering in the ocean) 43.30.Dr (Hybrid and asymptotic propagation theories, related experiments)

李鋆, 李整林, 任云. Spatial correlation of the high intensity zone in deep-water acoustic field[J]. 中国物理B, 2016, 25(12): 124310-124310.

Jun Li(李鋆), Zheng-Lin Li(李整林), Yun Ren(任云). Spatial correlation of the high intensity zone in deep-water acoustic field[J]. Chin. Phys. B, 2016, 25(12): 124310-124310.

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Spatial correlation of the high intensity zone in deep-water acoustic field

Spatial correlation of the high intensity zone in deep-water acoustic field

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