Normal‐mode theory of underwater sound propagation from stationary multipole sources: results for a realistic sound‐speed profile

1975 ◽  
Vol 57 (5) ◽  
pp. 1052-1061 ◽  
Author(s):  
Anton J. Haug ◽  
Ronald D. Graves ◽  
H. Überall
Keyword(s):  
Normal Mode ◽  
Sound Speed ◽  
Sound Propagation ◽  
Speed Profile ◽  
Underwater Sound ◽  
Sound Speed Profile ◽  
Mode Theory ◽  
Normal Mode Theory ◽  
Multipole Sources

Comparison of Sound Propagation Characteristic between Deep and Shallow Water

2014 ◽  
Vol 577 ◽  
pp. 1198-1201
Author(s):  
Zhang Liang ◽  
Chun Xia Meng ◽  
Hai Tao Xiao
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Sound Speed ◽  
Sound Propagation ◽  
Spherical Wave ◽  
Sound Field ◽  
Propagation Loss ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Propagation Law

The physical characteristics are compared between shallow and deep water, in physics and acoustics, respectively. There is a specific sound speed profile in deep water, which is different from which in shallow water, resulting in different sound propagation law between them. In this paper, the sound field distributions are simulated under respective typical sound speed profile. The color figures of sound intensity are obtained, in which the horizontal ordinate is distance, and the vertical ordinate is depth. Then we can get some important characteristics of sound propagation. The results show that the seabed boundary is an important influence on sound propagation in shallow water, and sound propagation loss in deep water convergent zone is visibly less than which in spherical wave spreading. We can realize the remote probing using the acoustic phenomenon.

An improved approximation for sound propagation in a medium with a linear sound‐speed profile

1995 ◽  
Vol 98 (5) ◽  
pp. 2924-2925
Author(s):  
Michael J. White ◽  
Y. L. Li ◽  
Jianfeng Tai
Keyword(s):  
Sound Speed ◽  
Sound Propagation ◽  
Speed Profile ◽  
Sound Speed Profile

Simulation for Range Prediction of Active Sonar in Shallow Water

2013 ◽  
Vol 385-386 ◽  
pp. 514-517 ◽  
Author(s):  
Liang Zhang ◽  
Chun Xia Meng ◽  
Jian Na
Keyword(s):  
Shallow Water ◽  
Sound Speed ◽  
Sound Absorption ◽  
Sound Propagation ◽  
Propagation Characteristic ◽  
Water Medium ◽  
Speed Profile ◽  
Long Distance ◽  
Sound Speed Profile ◽  
Active Sonar

In shallow water the acoustic wave from ambient noise sources carries a large number of environment information based on the complicated reflection both on the surface and seabed interface. The sound speed profile is one of the influencing factors of sound propagation characteristic, while for a long distance the sound absorption coefficient of water medium has an important significance to propagation range. The simulation results show that in shallow water sound absorption of seabed, sound speed profile and sound absorption of water were taken into account, then range prediction of active sonar can be exactly obtained using normal-mode propagation.

Ocean Front Model Based on Sound Speed Profile and its Influence on Sound Propagation

2021 ◽  
Author(s):  
Yuyao Liu ◽  
Wen Chen ◽  
Wei Chen ◽  
Yu Chen ◽  
Lina Ma ◽  
...  
Keyword(s):  
Sound Speed ◽  
Sound Propagation ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Model Based ◽  
Ocean Front ◽  
Front Model

Influence of Sound Speed Profile on Source Localization at Different Depths

2017 ◽  
Vol 25 (02) ◽  
pp. 1750026 ◽  
Author(s):  
L. Su ◽  
L. Ma ◽  
S. M. Guo
Keyword(s):  
Shallow Water ◽  
Normal Mode ◽  
Source Localization ◽  
Sound Speed ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Different Depths ◽  
Negative Gradient

The effect of sound speed profile (SSP) mismatch on source localization in shallow-water waveguides with a typical negative gradient (or thermocline) is studied numerically and experimentally. The results are interpreted using a normal mode model and a ray model. It is found that a matched-field processor is insensitive to SSP mismatch for sources above the thermocline. In addition, the sensitivity of the processor to SSP mismatch increases with the depth of sources above the thermocline.

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