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