Effect of shore line on "Singing"

Bose, S. K. (1965) Effect of shore line on "Singing" Bulletin of the Calcutta Mathematical Society, 57 . pp. 87-94. ISSN 0008-0659

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"Singing" is a phenomenon associated with offshore seismic prospecting in which the seismic record has the appearance of a series of sine waves or simple odd harmonic combination of sine waves. Liu has proved the inadequacy of the theory Burg et al in which wave guide action in the water layer was proposed. Werth et al and Backus have independently suggested that the energy is probably reflected from a deeper horizon rather than the ocean bottom. Ghosh has suggested that the inclination of the ocean bottom in offshore areas is probably responsible.The effect of shore line has been considered here from a different stand point. It has been proved that progressive waves together with reflected waves from the coast give rise to resonant waves identical with the third and higher harmonics of "singing". It is suggested that these harmonics , so prominant on records, are reinforced due to shore line.

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