Accession Number : AD0457161


Title :   TRANSDUCER AND INTERPHONE SYSTEM FOR OPERATION IN HIGH-AMBIENT NOISE.


Descriptive Note : Quarterly progress rept. no. 1, 24 Jun30 Sep 64,


Corporate Author : CBS LABS STAMFORD CT


Personal Author(s) : Rosenheck, A J


Report Date : 30 Oct 1964


Pagination or Media Count : 50


Abstract : This report describes work performed toward development of a voice communication system for military vehicles. A literature survey of past efforts pertinent to the present program was performed and the results are reported. Two approaches toward picking up speech in high ambient noise are described, namely, the pressure-gradient (noise-cancelling) and contact transducers. Design factors of ear cushions as well as shortcomings of present models are discussed. Criteria for determining maximum safe noise level at the ears is included. A noise study was performed in the M114 and XM577 armored vehicle. Data are presented and conclusions are drawn concerning level and spectrum of the measured noise. (Author)


Descriptors :   ELECTROACOUSTIC TRANSDUCERS , VOICE COMMUNICATIONS , VEHICLES , NOISE , EAR , TOLERANCES(PHYSIOLOGY)


Distribution Statement : APPROVED FOR PUBLIC RELEASE