Accession Number : ADD001325

Title :   Transducer for FM Sonar Application.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Cook,Rufus L

Report Date : 10 Dec 1974

Pagination or Media Count : 6

Abstract : The patent describes a narrow beam, electroacoustic sonar transducer that substantially reduces acoustic energy cross-coupling between projecting and receiving portions thereof during continuous FM use. The transducer is characterized by a pair of semi-annular piezoelectric projecting elements arranged in concentric relation to a pair of semi-circular, piezoelectric receiving elements all lying in a common plane. The reverse sides of the elements are slotted, and the spaces between the elements are filled with acoustic energy transfer barrier material. The piezoelectric elements and acoustic energy barrier material are encapsulated as an assembly in a layer of deaerated polyurethane material.

Descriptors :   *Sonar transducers, *Patents, Electroacoustic transducers, Frequency modulation, Coupling(Interaction), Reduction

Subject Categories : Electrical and Electronic Equipment
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE