Shallow-Water Reverberation and Seabottom Acoustic Parameters

2001 ◽  
Author(s):  
J. X. Zhou
Keyword(s):  
Shallow Water ◽  
Acoustic Parameters

Short range sound propagation in shallow water and geo-acoustic parameters inversion

2012 ◽  
Vol 131 (4) ◽  
pp. 3280-3280
Author(s):  
Xuegang Zhang ◽  
Chunxia Meng ◽  
Haohao Hu ◽  
Jing Han
Keyword(s):  
Shallow Water ◽  
Short Range ◽  
Sound Propagation ◽  
Acoustic Parameters ◽  
Parameters Inversion

Using Ambient Noise to Inverse Geo-Acoustic Parameters

2012 ◽  
Vol 588-589 ◽  
pp. 851-855
Author(s):  
Chun Xia Meng ◽  
Gui Juan Li ◽  
Liang Zhang
Keyword(s):  
Shallow Water ◽  
Ambient Noise ◽  
Theoretical Study ◽  
Ocean Surface ◽  
Ray Theory ◽  
Acoustic Parameters ◽  
Low Frequencies ◽  
Research Results ◽  
Noise Data ◽  
Stratified Ocean

This paper presents a theoretical study of the vertical coherence of ocean ambient noise as the source is the windy ocean surface on the ray theory. At low frequencies less than 2 kHz, the sensitivity of stratified fluid seabed to the vertical coherence of ambient noise in shallow water is analyzed under the condition of distance-irrespective stratified ocean. Using ambient noise data from Chinese north shallow water seabed geo-acoustics parameters are obtained, and the research results show that the inverted method is effective.

Effect of Guide’s Acoustic Parameters on Vertical Directivity of the Marine Ambient Noise

2014 ◽  
Vol 577 ◽  
pp. 1207-1210
Author(s):  
Chun Xia Meng ◽  
Hao Mu ◽  
Gui Juan Li
Keyword(s):  
Shallow Water ◽  
Sound Speed ◽  
Ambient Noise ◽  
Sound Propagation ◽  
Sea Water ◽  
Surface Boundary ◽  
Ray Theory ◽  
Directivity Characteristic ◽  
Acoustic Parameters ◽  
Equipment Performance

The vertical directivity characteristic of ambient noise is one inherent characteristic of the ocean in shallow water. And it includes the information of guide’s acoustic characteristic information. The marine guide is composed of sea water; seabed and surface boundary, there into, the acoustic parameters of seabed are hardly obtained exactly. In this paper, the model of vertical directivity for ambient noise is established. Based on the ray theory of sound propagation, the influence of guide’s acoustic parameters which include sound speed, density and attenuation coefficient on vertical directivity of marine ambient noise is simulated. The results are propitious to analysis and command the characteristics of ambient noise, and valuable to accelerate the exertion of acoustic equipment performance.

Inversion of seabed acoustic parameters in shallow water using the warping transform

2013 ◽  
Author(s):  
Juan Zeng ◽  
N. Ross Chapman ◽  
Julien Bonnel ◽  
Li Ma ◽  
Yan Chen
Keyword(s):  
Shallow Water ◽  
Acoustic Parameters

Inversion of seabed acoustic parameters in shallow water using the warping transform

2013 ◽  
Vol 133 (5) ◽  
pp. 3304-3304 ◽  
Author(s):  
Juan Zeng ◽  
N.Ross Chapman ◽  
Li Ma ◽  
Yan Chen
Keyword(s):  
Shallow Water ◽  
Acoustic Parameters

The Effect of Sea Bottom Acoustic Parameters on Acoustic Wave Transmission in Shallow Water

2012 ◽  
Vol 588-589 ◽  
pp. 790-793
Author(s):  
Jing Han ◽  
Hao Hao Hu ◽  
Chun Xia Meng ◽  
Xue Gang Zhang
Keyword(s):  
Acoustic Wave ◽  
Shallow Water ◽  
Transmission Loss ◽  
Wave Transmission ◽  
Sediment Layer ◽  
Acoustic Parameters ◽  
Sea Bottom ◽  
Basement Layer

The acoustic parameters of the sea bottom were an important factor which affected the acoustic wave transmission in shallow water. This work devoted to study the effect of sea bottom parameters on acoustic wave transmission. The sea bottom was divided into two layers. The acoustic wave transmission loss(tl) under different sea bottom parameters was computed using KRAKENC program in the frequency of 500Hz. The simulated results showed that the acoustic parameters of sediment layer had important effect on acoustic wave transmission and the acoustic parameters of basement layer had almost no effect on acoustic wave transmission.

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