On the Calculation of Acoustic Intensity Fluctuations Caused by Ocean Currents
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATHEMATICAL SCIENCES
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Ocean currents can cause significant and interesting effects on the intensity of underwater sound transmissions. We study this phenomenon via the parabolic approximation, beginning with conservation laws, and derive a family of equations, each of which is valid for different magnitudes of current speed, current gradient, and sound-speed variation. Numerical results indicate that some current structures can cause large variations in received intensity, and that substantial differences can occur in reciprocal transmissions. Current effects on intensity may be quite sensitive to the sound-speed distribution.
- Physical and Dynamic Oceanography