Accession Number : AD0783099
Title : A Theoretical and Experimental Investigation of the Parametric Acoustic Receiving Array
Descriptive Note : Technical rept.
Corporate Author : TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
Personal Author(s) : Truchard, James J
PDF Url : AD0783099
Report Date : May 1974
Pagination or Media Count : 149
Abstract : The parametric reception of a low frequency plane wave by the use of nonlinear interactions between acoustic waves is examined both theoretically and experimentally. The parametric reception of a low frequency wave is accomplished by the use of a high frequency acoustic pump wave which interacts with the low frequency signal wave to produce sound waves at the sum and difference frequencies. These sound waves are received by a second transducer placed on the axis of the pump transducer. This type of parametric array allows for the possibility of narrowbeam detection of a low frequency acoustic signal wave.
Descriptors : *ACOUSTIC ARRAYS, *UNDERWATER SOUND, COMPUTER PROGRAMS, HIGH FREQUENCY, HYDROPHONES, LOW FREQUENCY, PLANE WAVES, TRANSDUCERS, WAVE EQUATIONS
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE