Accession Number : ADD002524

Title :   Multiple-Frequency Transducer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Madison,Theodore C ; Frey,Harlan G

Report Date : 20 Apr 1976

Pagination or Media Count : 6

Abstract : The patent relates to a transducer which comprises an array of prestressed, mass-loaded, piezoelectric, low-frequency, transducer elements set within a housing, a thin alignment plate bonded to the planar radiating faces of the low-frequency transducer array, a pressure-release sheet bonded to the thin alignment plate, and a high frequency, planar, transducer array bonded to this pressure-release sheet. The high frequency transducer array in combination with its two backing layers forms an integral part of the low frequency transducer array during low frequency operation in addition to providing high frequency transmission and reception during high frequency operation. This transducer construction permits high transmitting and receiving sensitivities at widely separated frequencies.

Descriptors :   *Transducers, *Sonar equipment, *Patents, Electromechanical devices, Low frequency, High frequency

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE