SPEECH-INTELLIGIBILITY AND TALKER-RECOGNITION TESTS OF AIR FORCE VOICE COMMUNICATION SYSTEMS

Word-intelligibility (psycho-acoustic), Articulation Index (electrical) and voice recognition tests were made on the Thule, Greenland, to Cape Dyer, Baffin Island, link of the DEWDROP tropos pheric-scatter communication system, and on the Gander, Newfoundland, to Harmon Air Force Base, Newfoundland,...

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Bibliographic Details
Main Author: Stuntz, Stephen E.
Other Authors: ELECTRONIC SYSTEMS DIV L G HANSCOM FIELD MA OPERATIONAL APPLICATIONS OFFICE
Format: Text
Language:English
Published: 1963
Subjects:
Radio Communications
Voice Communications
*SPEECH RECOGNITION
*VOICE COMMUNICATIONS
*TROPOSPHERIC SCATTER COMMUNICATIONS
AIR FORCE
INTELLIGIBILITY
QUALITY CONTROL
ARTICULATION INDEX
POLEVAULT LINK
DEWDROP LINK
Baffin Island
Cape Dyer
Dyer
Greenland
Baffin
Newfoundland
Thule
Online Access:http://www.dtic.mil/docs/citations/AD0402989
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0402989
Description
Summary:Word-intelligibility (psycho-acoustic), Articulation Index (electrical) and voice recognition tests were made on the Thule, Greenland, to Cape Dyer, Baffin Island, link of the DEWDROP tropos pheric-scatter communication system, and on the Gander, Newfoundland, to Harmon Air Force Base, Newfoundland, link of the POLEVAULT tropospheric scatter communication system, and compared against similar tests taken on a laboratory reference system. Harvard phonetically-balanced (PB) word-lists were used in the psycho-acoustic tests; an abbreviated octave-band form of the Articulation Index procedure (after Kryter) was the basis of the electrical tests. These two measures agreed in ranking the three systems in order of intelligibility from highest to lowest: laboratory, POLEVAULT and DEWDROP. It is concluded that the Articulation Index technique suitably modified, is feasibile and useful for voice-system performancuation and quality control testing. It is also concluded, tentatively, that system characteristics affecting intelligibility do not necessarily affect listeners' ability to recognize individual talkers.

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