Accession Number : ADD001777

Title :   Standing Wave Acoustic Parametric Source.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Rogers,Peter H ; Van Buren,Arnie Lee

Report Date : 18 Mar 1975

Pagination or Media Count : 4

Abstract : The patent relates to a piston type transducer in combination with a thin wall waveguide which is terminated by a thin plug of pressure release material to form a resonant cavity. The transducer is driven simultaneously at two closely spaced high intensity, high frequency signals. The two frequencies are chosen to be either neighboring resonances or to be within the bandwidth of a single resonance. A low frequency acoustic wave is generated by the nonlinear interaction of the two high frequency standing waves in the fluid within the resonant cavity and radiates omnidirectionally into the surrounding medium through the thin walled waveguide.

Descriptors :   *Underwater sound generators, *Patents, Sonar transducers, Extremely low frequency, Omnidirectional, Parametric devices, Standing waves, Interactions

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE