Applications of Waveguide Invariant Theory to the Analysis of Interference Phenomena in Deep Water
LI Qian-Qian1,2,3**, LI Zheng-Lin1,2, ZHANG Ren-He1
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 2Haikou Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105 3Graduate University of Chinese Academy of Sciences, Beijing 100190
Applications of Waveguide Invariant Theory to the Analysis of Interference Phenomena in Deep Water
LI Qian-Qian1,2,3**, LI Zheng-Lin1,2, ZHANG Ren-He1
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 2Haikou Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105 3Graduate University of Chinese Academy of Sciences, Beijing 100190
摘要The waveguide invariant, denoted as β, can be used to describe the slope of the intensity of a broadband acoustic signal. In deep water, the interference patterns of the areas with dominant waterborne modes and only with bottom bounce modes are greatly different. This phenomenon is illustrated by simulation and explained by the distribution of β. The theory shows that in the convergence zone, β approaches infinity, which leads to the larger slope of sound intensity; on the contrary, in the shadow zone, β is close to 1, leading to smaller slopes.
Abstract：The waveguide invariant, denoted as β, can be used to describe the slope of the intensity of a broadband acoustic signal. In deep water, the interference patterns of the areas with dominant waterborne modes and only with bottom bounce modes are greatly different. This phenomenon is illustrated by simulation and explained by the distribution of β. The theory shows that in the convergence zone, β approaches infinity, which leads to the larger slope of sound intensity; on the contrary, in the shadow zone, β is close to 1, leading to smaller slopes.
(Signal coherence or fluctuation due to sound propagation/scattering in the ocean)
引用本文:
LI Qian-Qian;**;LI Zheng-Lin;ZHANG Ren-He
. Applications of Waveguide Invariant Theory to the Analysis of Interference Phenomena in Deep Water[J]. 中国物理快报, 2011, 28(3): 34303-034303.
LI Qian-Qian, **, LI Zheng-Lin, ZHANG Ren-He
. Applications of Waveguide Invariant Theory to the Analysis of Interference Phenomena in Deep Water. Chin. Phys. Lett., 2011, 28(3): 34303-034303.
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2011, Vol. 28 
