Abstract
Diffraction over a seamount has been studied by experiments with a three-dimensional physical model of DICKENS seamount. When laboratory diffraction and scattering data are scaled to the ocean and added to absorption and refraction losses at sea, there is excellent agreement with ocean experiments reported by Ebbeson et al. (J. Acoust. Soc. Am. 64, S76 (1978). Both the magnitude and the frequency dependence of the shadowing at sea are predicted over a decade of frequencies.
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References
G. R. Ebbeson, J. M. Tborleifson and R.G. Turner, “Shadowing of sound propagation by a seamount in the northeast Pacific”, J. Acoust. Soc. Am. 64, S76 (1978).
D. A. Nutile and A. N. Guthrie, “Acoustic shadowing by seamounts”, J. Acoust. Soc. Am. 66, 1813–1817 (1979).
R. P. Spaulding, Jr., “Physical modeling of sound shadowing by seamounts”, M.S. Thesis, Naval Postgraduate School, Monterey, CA 93940, (1979).
H. Medwin and R. Spaulding, “Shadowing by seamounts”, J. Acoust. Soc. Am. 66, S76, (1979).
M. A. Biot and I. Tolstoy, “Formulation of wave propagation in infinite media by normal coordinates with an application to diffraction”, J. Acoust. Soc. Am. 29, 381–391 (1957).
See also I. Tolstoy “Wave Propagation”, McGraw-Hill Book Co., Inc., New York, (1973).
H. Medwin, “Shadowing by finite noise barriers”, submitted for publication in J. Acoust. Soc. Am. (1980).
F. D. Tappert, “The parabolic approximation method”, Ch. V in Lecture Notes in Physics, 70, Wave Propagation and Underwater Acoustics, ed. by J. B. Keller and J. S. Papadakis, Springer-Verlag, New York (1977).
C. S. Clay and H. Medwin, “Acoustical Oceanography”, Wiley, NewYork (1977). (Ch. 10, Scattering and Reflection of Sound at Rough Surfaces).
G. R. Ebbeson, Private communication.
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© 1980 Plenum Press, New York
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Medwin, H., Spaulding, R.P. (1980). The Seamount as a Diffracting Body. In: Kuperman, W.A., Jensen, F.B. (eds) Bottom-Interacting Ocean Acoustics. NATO Conference Series, vol 5. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-9051-0_29
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DOI: https://doi.org/10.1007/978-1-4684-9051-0_29
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