Accession Number:

AD0748202

Title:

Speech Intelligibility in Naval Aircraft Radios

Descriptive Note:

Research and Development rept.

Corporate Author:

NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA

Personal Author(s):

Report Date:

1972-08-02

Pagination or Media Count:

76.0

Abstract:

A study was made to determine how speech intelligibility in naval aircraft radio communications is affected by cockpit noise, by the microphone, helmet, and microphone used by the pilot, and by the vocabulary employed. Using six standard word lists, speech-intelligibility tests were administered to 20 Navy enlisted men for 38 hours of listening. Cockpit noise in which the lists were recorded was both in-flight and simulated. The talker and the speech- processing equipment are largely responsible for the quality of the transmissions. Cockpit noise, microphone, and man-worn gear have negligibly degrading effect upon intelligibility of the aircraft radio communications. Speech-processing is recommended to achieve improved intelligibility. Recommendations are made for choosing optimum intelligibility tests for assessing military speech communication systems and for revising the Brevity Code words.

Subject Categories:

  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE