Effects of complex seabed topography on the characteristics of wind-generated ambient noise

被引：0
|
作者：
Yi X. [1 ]
Lin J. [1 ]
Jiang P. [1 ]
Sun J. [1 ]
Shan Y. [1 ,2 ]
机构：
[1] Qingdao Branch, Institute of Acoustics, Chinese Academy of Sciences, Qingdao
[2] University of Chinese Academy of Sciences, Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2020年 / 41卷 / 10期
关键词：
Ambient noise; Noise level; Ray theory; Seabed topography; Seamount; Seamount island; Three-dimensional model; Vertical directionality; Wind-generated noise;
D O I：
10.11990/jheu.202007050
中图分类号：
学科分类号：
摘要：
The seabed topography near a seamount/island is usually complex and can dramatically affect sound propagation in waveguides. This makes the modeling and simulation of ambient noise more difficult. Using actual seabed topography data, in this study, we constructed a wind-generated ambient noise model for complex seabed areas using N×2D and 3D algorithms based on ray theory. The model results show that in the case of a negative-gradient sound-speed profile, the wind-generated ambient noise level and vertical directionality in each bearing sector of the receiver are obviously different for bearings at a seamount/island, and those on the flat sea-floor. The omnidirectional wind-generated noise level at the receiver near the seamount/island is slightly higher than that at the farther receiver. The simulation results also show that when the sound speed does not vary with range and bearing for the seamount/island used in this paper, the results such as wind-generated ambient noise level vs depth, and vertical directionality, and those in each sector obtained by N×2D approximation and the 3D algorithm, respectively, are different but have the same trend. Therefore, the N×2D algorithm can be used when rapid simulation is required. Copyright ©2020 Journal of Harbin Engineering University.
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页码：1505 / 1512
页数：7
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