Horizontal-Longitudinal Correlations of Acoustic Field in Deep Water
LI Jun1,2, LI Zheng-Lin1,3**, REN Yun1, LI Wen1,2, ZHANG Ren-He1
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 2University of Chinese Academy of Sciences, Beijing 100190 3Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105
Abstract：The horizontal-longitudinal correlations of the acoustic field in deep water are investigated based on the experimental data obtained in the South China Sea. It is shown that the horizontal-longitudinal correlation coefficients in the convergence zone are high, and the correlation length is consistent with the convergence zone width, which depends on the receiver depth and range. The horizontal-longitudinal correlation coefficients in the convergence zone also have a division structure for the deeper receiver. The signals from the second part of the convergence zone are still correlated with the reference signal in the first part. The horizontal-longitudinal correlation coefficients in the shadow zone are lower than that in the convergence zone, and the correlation length in the shadow zone is also much shorter than that in the convergence zone. The numerical simulation results by using the normal modes theory are qualitatively consistent with the experimental results.
(Signal coherence or fluctuation due to sound propagation/scattering in the ocean)
引用本文:
. [J]. 中国物理快报, 2015, 32(06): 64303-064303.
LI Jun, LI Zheng-Lin, REN Yun, LI Wen, ZHANG Ren-He. Horizontal-Longitudinal Correlations of Acoustic Field in Deep Water. Chin. Phys. Lett., 2015, 32(06): 64303-064303.
2015, Vol. 32 
