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- W2042203528 abstract "A surface, manufactured out of Styrofoam, provided a pressure release surface for an underwater, forward-scattering investigation. This surface was a single realization from a population of Gaussian spectrum random rough corrugated surfaces (rms roughness 1.5 cm, correlation length 10 cm). A broadband omnidirectional source was operated in the frequency range of 95–400 kHz and a broadband receiver was used to measure sound scattered from the surface. The frequency dependence of the mth higher-order intensity moments Im was measured and compared to theoretical predictions [M. V. Berry, J. Phys. A 10, 2061–2081 (1977)] that Im is proportional to kνm (for m≳2), where k is the wave number and νm is a twinkling exponent, and that I2∝ln k. Also, the dependence of I2 on distance from the surface was examined at a single frequency utilizing various pulse durations. It is known that far from a surface the wave field will obey Gaussian statistics (I2=2). For short pulses, however, the statistics of the wave field are strongly dependent upon individual reflections. For longer pulses this is the case as well near the surface, but as one moves away it is shown that the Gaussian limit is approached. [Work supported by ONR.]" @default.
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- W2042203528 date "1995-11-01" @default.
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- W2042203528 title "Intensity moments of underwater sound reflected by a Gaussian spectrum corrugated surface: Measurements and comparison with a catastrophe theory approximation" @default.
- W2042203528 doi "https://doi.org/10.1121/1.414196" @default.
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