Characteristics of low-frequency ambient noise in shallow water with heterogeneous bottom structure
- 作者: Bodjona S.D.1, Sidorov D.D.1, Petnikov V.G.1, Lunkov A.A.1,2
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隶属关系:
- Prokhorov General Physics Institute, Russian Academy of Sciences
- Bauman Moscow State Technical University
- 期: 卷 71, 编号 1 (2025)
- 页面: 79-87
- 栏目: АКУСТИКА ОКЕАНА. ГИДРОАКУСТИКА
- URL: https://rjsvd.com/0320-7919/article/view/683640
- DOI: https://doi.org/10.31857/S0320791925010091
- EDN: https://elibrary.ru/BQKDQZ
- ID: 683640
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详细
The characteristics of low-frequency noise fields in shallow-water acoustic waveguides with a heterogeneous bottom structure in the presence of water-like areas are analyzed through numerical experiments. Two models of the seabed are considered: an idealized one with a linear change in the sound speed in the bottom along one of the Cartesian coordinates and a realistic one where the sound speed in the bottom depends on all three coordinates. The second model is close to the real situation in one of the shallow water areas of the Kara Sea. Noise fields from distributed near-surface sources (surface waves) and a point source (ship noise) are studied. Calculations are performed using the wide-angle parabolic equation method. Averaged horizontal and vertical directivity characteristics of the surface wave noise field are obtained, as well as average intensity values depending on the sound frequency and the position of the receiving vertical array. Directional diagrams of the local source noise level are constructed for bottom areas with different properties. The possibility of detecting areas with a water-like bottom by recording the noise of a moving vessel on a stationary vertical acoustic array is demonstrated. In the case of distributed sources, it is shown that the averaged noise characteristics weakly depend on the sound speed in the bottom.
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作者简介
S. Bodjona
Prokhorov General Physics Institute, Russian Academy of Sciences
编辑信件的主要联系方式.
Email: bodjona@kapella.gpi.ru
俄罗斯联邦, Moscow, 119991
D. Sidorov
Prokhorov General Physics Institute, Russian Academy of Sciences
Email: sidorov@kapella.gpi.ru
俄罗斯联邦, Moscow, 119991
V. Petnikov
Prokhorov General Physics Institute, Russian Academy of Sciences
Email: petniko@kapella.gpi.ru
俄罗斯联邦, Moscow, 119991
A. Lunkov
Prokhorov General Physics Institute, Russian Academy of Sciences; Bauman Moscow State Technical University
Email: lunkov@kapella.gpi.ru
俄罗斯联邦, Moscow, 119991; Moscow, 105005
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