Acoustic propagation through anisotropic internal wave fields: Transmission loss, cross-range coherence, and horizontal refraction

2002 ◽  
Vol 111 (2) ◽  
pp. 769-784 ◽  
Author(s):  
Roger Oba ◽  
Steven Finette
Keyword(s):  
Internal Wave ◽  
Transmission Loss ◽  
Acoustic Propagation ◽  
Wave Fields ◽  
Horizontal Refraction

Effect of tidal internal wave fields on shallow water acoustic propagation

2010 ◽  
Author(s):  
Ju Lin ◽  
Huan Wang ◽  
Junping Sun ◽  
Jeffrey Simmen ◽  
Ellen S. Livingston ◽  
...  
Keyword(s):  
Internal Wave ◽  
Shallow Water ◽  
Acoustic Propagation ◽  
Wave Fields

scholarly journals Experimental evidence of internal wave attractor signatures hidden in large-amplitude multi-frequency wave fields

2021 ◽  
Vol 915 ◽  
Author(s):  
F. Beckebanze ◽  
K.M. Grayson ◽  
L.R.M. Maas ◽  
S.B. Dalziel
Keyword(s):  
Internal Wave ◽  
Experimental Evidence ◽  
Large Amplitude ◽  
Frequency Wave ◽  
Wave Fields

Abstract

Flow-dependent modeling of acoustic propagation based on DG-FEM method

2021 ◽  
Author(s):  
Zichen Wang ◽  
Jian Xu ◽  
Xuefeng Zhang ◽  
Can Lu ◽  
Kangkang Jin ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Transmission Loss ◽  
Acoustic Propagation ◽  
Water Area ◽  
Current Speed ◽  
Propagation Model ◽  
Propagation Loss ◽  
Two Dimensional ◽  
Underwater Sound ◽  
Ocean Environment

AbstractThis paper proposes a two-dimensional underwater sound propagation model using the Discontinuous Galerkin Finite Element Method (DG-FEM) to investigate the influence of current on sound propagation. The acoustic field is calculated by the convected wave equation with the current speed parameter. Based on the current speed data from an assimilation model, a two-dimensional coupled acoustic propagation model in the Fram Strait water area is established to observe the variability in propagation loss under different seasonal velocities in the real ocean environment. The transmission loss and signal time structure are examined. The results obtained in different source frequencies are also compared. It appears that the current velocity, time and range variation all have an effect on underwater sound propagation.

Acoustic mode coupling induced by internal wave fields in shallow water

1995 ◽  
Vol 98 (5) ◽  
pp. 2869-2869
Author(s):  
Steven Finette ◽  
Dirk Tielbuerger ◽  
Stephen Wolf
Keyword(s):  
Internal Wave ◽  
Shallow Water ◽  
Mode Coupling ◽  
Acoustic Mode ◽  
Wave Fields

Acoustic intensity and phase variability caused by time‐evolving internal wave fields

1999 ◽  
Vol 105 (2) ◽  
pp. 1311-1311 ◽  
Author(s):  
Steven Finette ◽  
Marshall Orr ◽  
Altan Turgut ◽  
Stephen Wolf ◽  
Bruce Pasewark ◽  
...  
Keyword(s):  
Internal Wave ◽  
Acoustic Intensity ◽  
Wave Fields ◽  
Phase Variability

scholarly journals Interaction Features of Internal Wave Breathers in a Stratified Ocean

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 205
Author(s):  
Ekaterina Didenkulova ◽  
Efim Pelinovsky
Keyword(s):  
Internal Wave ◽  
Internal Waves ◽  
Gravity Waves ◽  
Fourth Order ◽  
Numerical Experiments ◽  
Vries Equation ◽  
Internal Gravity Waves ◽  
Wave Fields ◽  
Tidal Waves ◽  
Stratified Ocean

Oscillating wave packets (breathers) are a significant part of the dynamics of internal gravity waves in a stratified ocean. The formation of these waves can be provoked, in particular, by the decay of long internal tidal waves. Breather interactions can significantly change the dynamics of the wave fields. In the present study, a series of numerical experiments on the interaction of breathers in the frameworks of the etalon equation of internal waves—the modified Korteweg–de Vries equation (mKdV)—were conducted. Wave field extrema, spectra, and statistical moments up to the fourth order were calculated.

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