Title: Nonlinear Parametric Transduction in Underwater Acoustics
Abstract: Over the p ast decade, nonlinear acoustics has experienced an unprecedented expansion in theory, experiment, and application. This vigorous activity has its roots in Westervelt's theoretical discovery of the parametric acoustic arra,y (1960). This type of transducer utilizes the nonlinear properties of the water itself to produce a low frequency, superdirective radiation from the parametric interaction of two high frequency generating waves, The superdirective radiation so created is a wide band entity having no spatial diffraction lobes. Several practical applications of parametric arrays are now emerging; these include bathymetric profiling, the location of artifacts in marine archeolotg, ultrasonic imaging and biomedical diagno_s_tics, and measurements on waveguide propagation in shallow water. and will demonstrate their behavior and their application by presenting experimental This paper will survey some of the fundamentals underlying these phenomena results.
Publication Year: 1974
Publication Date: 1974-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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