Propagation of Sound in a Layered Laboratory Model.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The propagation of sound in a laboratory model consisting of a surface layer of water overlying a thick bottom layer of sand was experimentally investigated. The variations of pressure amplitude as a function of receiver depth, range, and transverse location were measured for the source at constant depth in the surface layer of water. Three frequencies for which only the lowest mode propagates were used in this investigation. The measurements of pressure amplitude as a function of depth and range were found in good agreement with normal mode theory, when absorption in the bottom was taken into consideration. Keywords include Sound propagation, Shallow water, Normal modes, Shallow water facility, Theses.