Accession Number : ADD004374

Title :   Non-Linear Acoustic Transducer.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Percy,Joseph L ; Duykers,Ludwig R

Report Date : 08 Aug 1977

Pagination or Media Count : 17

Abstract : An improvement for a transducer provides an improved operational characteristic for the transmission and reception of acoustic energy in a liquid medium. A rigid shell having an open end and a closed end is vertically oriented to contain a transducer disposed in a portion of the liquid medium. Inside the shell and in direct contact with the surface of the portion of liquids is a gas filled chamber. The transducer and chamber acoustically cooperate to heterodyne transmitted or received acoustic energy. Difference and sum frequencies optionally are selected for data processing. The frequencies of the heterodyned signals are changed by changing the dimensions of the gas filled chamber. Thus, the relatively small transducer is capable of broadband and low frequency transmission. (Author)

Descriptors :   *Patent applications, *Electroacoustic transducers, *Nonlinear systems, Heterodyning, Broadband, Low frequency

Subject Categories : Electrical and Electronic Equipment
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE