Accession Number : ADD005179

Title :   High Fidelity Low Frequency Transducer for Use at Great Depth.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Abbott,Frank R

Report Date : 13 Dec 1977

Pagination or Media Count : 4

Abstract : A hose-like hydrophone array is insensitive to ambient pressure variations while retaining an acceptable performance capability. Ferroelectric cylinders mount rigid cylinders at opposite ends and are separated by elongate lengths of corrugated tubing. A dielectric oil fills the cylinders and lengths of corrugated tubing to make the array relatively insensitive to pressure variations. Since the dielectric oil is several times (five to 10) more compressible than the ambient water, the ferroelectric elements can more compliantly respond to a broader bandwidth of impinging or radiated acoustic energy. The radially rigid lengths of tubing hold a greater volume of the relatively compressible oil to permit this response. (Author)

Descriptors :   *Patents, *Hydrophones, *Transducers, Low frequency, Oils, Dielectric properties

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE