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- W2067682015 abstract "This presentation is devoted to the investigation of sound scattering by wind waves in case of propagation in shallow water (∼20 m) at distances of 100–1000 m and frequencies of 1–5 kHz. We consider several models and direct numerical calculation based on small perturbation theory that allows reconstruction of the reverberation levels when given knowledge of the wind-driven rough surface displacement spectrum. Some data were obtained in an experiment where simultaneous acoustic and surface roughness measurements were made. We also describe a new optical method to measure the surface roughness in detail. The technique uses a video recording of the surface over an area about 10 × 10 wavelengths (the most energetic surface waves) and a zoomed-in video recording of a spar buoy located within this area. Processing the entire image gives a distribution of brightness as a function of time and horizontal coordinates. Processing the buoy’s video allows one to obtain a record of surface displacement at that point. The distribution of brightness of the entire area can then be calibrated and recalculated to yield the 2-D (x and y) elevation as a function of time and thus the 3-D surface spectrum. [B.M.S. and M.B.S. acknowledge the support of ONRG.]" @default.
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- W2067682015 date "2011-04-01" @default.
- W2067682015 modified "2023-09-26" @default.
- W2067682015 title "Reconstruction of reverberation levels based on measured surface roughness: Theory and experiment." @default.
- W2067682015 doi "https://doi.org/10.1121/1.3588296" @default.
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