Separation of acoustic normal modes in shallow water

2021 ◽  
Vol 149 (4) ◽  
pp. A66-A67
Author(s):  
Sergei Sergeev ◽  
Konstantin Dmitriev ◽  
Andrey Shurup
Keyword(s):  
Shallow Water ◽  
Normal Modes

Coupling of acoustic normal modes in shallow water

1982 ◽  
Vol 71 (S1) ◽  
pp. S11-S11
Author(s):  
Suzanne T. McDaniel
Keyword(s):  
Shallow Water ◽  
Normal Modes

A DEDISPERSION TRANSFORM FOR SOUND PROPAGATION IN SHALLOW WATER WAVEGUIDE

2010 ◽  
Vol 18 (03) ◽  
pp. 245-257 ◽  
Author(s):  
DA ZHI GAO ◽  
NING WANG ◽  
HAO ZHONG WANG
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Shallow Water ◽  
Sound Propagation ◽  
Normal Modes ◽  
Real Data ◽  
Present Approach ◽  
Dispersive Effect

For sound propagation in a shallow water waveguide, a dedispersion transform which can remove the dispersive effect of signal is described in this paper. The transform is a modified Fourier transform with two variables: translation and dispersion. Dispersive effect of signal for normal modes can be removed when these two variables match to real parameters. The validity of the present approach is verified in simulation and real data processing.

scholarly journals Retrieval of deterministic normal modes from cross-correlations of acoustic noise in shallow water

2015 ◽  
Author(s):  
Andrey S. Shurup ◽  
Sergei N. Sergeev ◽  
Valeriy V. Goncharov ◽  
Alexander I. Vedenev ◽  
Oleg A. Godin ◽  
...  
Keyword(s):  
Shallow Water ◽  
Acoustic Noise ◽  
Normal Modes ◽  
Cross Correlations

scholarly journals Accuracy of the pressure release bottom approximation for normal modes in shallow water

1990 ◽  
Vol 88 (S1) ◽  
pp. S58-S58
Author(s):  
Grayson H. Rayborn ◽  
Barry I. Barker ◽  
George E. Ioup ◽  
Juliette W. Ioup
Keyword(s):  
Shallow Water ◽  
Normal Modes ◽  
Pressure Release

scholarly journals A SEISMIC WAVE GUIDE PHENOMENON

Geophysics ◽  
1951 ◽  
Vol 16 (4) ◽  
pp. 594-612 ◽  
Author(s):  
K. E. Burg ◽  
Maurice Ewing ◽  
Frank Press ◽  
E. J. Stulken
Keyword(s):  
Phase Velocity ◽  
Shallow Water ◽  
Group Velocity ◽  
Seismic Wave ◽  
Normal Modes ◽  
Seismic Energy ◽  
Wave Guide ◽  
Energy Propagation ◽  
Effective Wave ◽  
Favorable Conditions

On one particular prospect in shallow water repetitive patterns appeared on short spread seismograms in such prevalence as to jeopardize identification of desired reflections. It is demonstrated that under favorable conditions, less restrictive than thought necessary heretofore, a layer of water comprises an effective wave guide for seismic energy propagation. Reinforcement fronts formed by multiple reflection of sound in water can develop into a set of waves completely overshadowing other seismic arrivals. With but minor modifications conventional wave guide theory applies. Examples from the prospect are presented to illustrate various reinforcement patterns. Observed frequency characteristics, group velocity, and phase velocity magnitudes are investigated for normal modes of propagation.

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