Accession Number : AD0610478

Title :   TRANSDUCER AND INTERCOMMUNICATION SYSTEM FOR AIR CREWMAN'S PROTECTIVE HEADGEAR,

Descriptive Note : Quarterly progress rept. no. 1, 23 Jun-30 Sep 64,

Corporate Author : CBS LABS STAMFORD CONN

Personal Author(s) : Townsend,Robert L. ; Ragonese,Frank L. ; DiMattia,Alfred L.

Report Date : 30 OCT 1964

Pagination or Media Count : 24

Abstract : The purpose of the research is to develop a helmet transducer and cordless intercommunication system. As a result of the system analysis of cordless intercommunication, preference for a carrier frequency between 20 and 30 mc, rather than 400 mc, was developed. Also, the desirability of several voice channels for adjacent, but distinctly separate, air crews is evident. Based upon literature study, a technique suited to the present need for evaluation of speech communications in the presence of noise has tentatively been adopted and is described.

Descriptors :   (*INTERCOMMUNICATION SYSTEMS, AIRCRAFT), (*TRANSDUCERS, INTERCOMMUNICATION SYSTEMS), (*SPEECH TRANSMISSION, INTELLIGIBILITY), VOICE COMMUNICATIONS, HELMETS, RADIOFREQUENCY INTERFERENCE, HIGH FREQUENCY, SPEECH RECOGNITION, NOISE, BANDWIDTH, AVIATION PERSONNEL

Distribution Statement : APPROVED FOR PUBLIC RELEASE