Accession Number : AD0783099
Title : A Theoretical and Experimental Investigation of the Parametric Acoustic Receiving Array.
Descriptive Note : Technical rept.,
Corporate Author : TEXAS UNIV AUSTIN APPLIED RESEARCH LABS
Personal Author(s) : Truchard,James J.
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. (Modified author abstract)
Descriptors : *Underwater sound, *Acoustic arrays, Plane waves, High frequency, Low frequency, Hydrophones, Transducers, Wave equations, Computer programs
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE