A Nearfield Model of the Parametric Radiator.
NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
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It is often necessary to measure and operate parametric radiators under conditions where finite range effects are important. A nearfield model is presented in which the source level is obtained by assuming the primary waves to be plane-cylindrical or diverging-conical depending upon whether the observation range is less or greater than the Rayleigh distance. Asymptotic beam patterns are obtained from the solution of an exponentially tapered line array. Nonlinear attenuation is not considered. Author
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