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High-Frequency Acoustical Reverberation from a Rough-Sea Surface

1964; Acoustical Society of America; Volume: 36; Issue: 10_Supplement Linguagem: Inglês

10.1121/1.1939188

1520-9024

C. S. Clay, Herman Medwin,

Underwater Vehicles and Communication Systems

The scattering of high-frequency underwater sound (λ≪waveheight) from the sea surface is described in terms of two mechanisms: (1) conventional scattering theory for a rough surface with normally distributed slopes appears to predict adequately the backscattering at incidence near normal; (2) a rather low population of near-surface resonant bubbles would suffice to explain the behavior at angles near grazing. The two effects are used to interpret the experimental surface-scattering data at high frequencies for all angles of incidence. [Hudson Labs. Columbia Univ. Informal Doc. No. 55.] [Work supported by the U. S. Office of Naval Research.]