Accession Number : AD0777518

Title :   Audio Transducer Research.

Descriptive Note : Semiannual technical rept. 29 Jun-31 Dec 73,

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : Dixon,F. ; Sikorski,M. E. ; Williamson,F. R. ; Newsom,R. A.

Report Date : FEB 1974

Pagination or Media Count : 46

Abstract : Audio transducers based on the piezoresistive and stressed-transistor principles were investigated for possible use in future tactical communications systems. The goal is to develop small (low visibility), light weight, hands-free microphones that can operate satisfactorily in a high noise environment. Although air-pathway noise-cancelling devices are also to be considered, the study focussed on speech pickup through the surface of the head or neck by means of either pressure microphones (using air as a coupling medium) or vibration transducers (using an elastomeric coupling, or more direct contact with the skin). (Modified author abstract)

Descriptors :   *TRANSDUCERS, *MICROPHONES, SOUND, NOISE REDUCTION, TRANSISTORS, PIEZOELECTRIC TRANSDUCERS

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE