Abstract
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.
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References
Lee, D., and Botseas, G., 1982, IFD: An implicit finite difference computer model for solving the parabolic equation, New London Lab., NUSC, New London, CT, TR 6659.
Robertson, J.S., Siegmann, W.L., and Jacobson, M.J., 1985, Current and current shear effects in the parabolic approximation for underwater sound channels, J. Acoust. Soc. Am., 77: 1768.
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© 1987 Plenum Press, New York
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Robertson, J.S., Jacobson, M.J., Siegmann, W.L. (1987). On the Calculation of Acoustic Intensity Fluctuations Caused by Ocean Currents. In: Merklinger, H.M. (eds) Progress in Underwater Acoustics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1871-2_47
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DOI: https://doi.org/10.1007/978-1-4613-1871-2_47
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-9043-8
Online ISBN: 978-1-4613-1871-2
eBook Packages: Springer Book Archive