Accession Number : AD0657469

Title :   AN EXPERIMENTAL COMPARISON OF 5 CONDITIONS FOR VOICE COMMUNICATION TRAINING,

Corporate Author : PURDUE UNIV LAFAYETTE IND

Personal Author(s) : Kelly,J. C.

Report Date : 10 JUL 1947

Pagination or Media Count : 17

Abstract : Five groups of undergraduate men were trained to increase word-intelligibility under difficult communication conditions, using course content founded on experience gained during World War II. Each group was trained in a situation presenting a different type or amount of interference. Effects of training were evaluated by word-intelligibility tests and by judgments of connected speech. All tests were presented under conditions of high level airplane-type noise. All training conditions required high effort on the part of speakers in order to be understood. Comparison of increases in word-intelligibility of experimental and control subjects showed that: (a) Subjects which practiced under most severe noise conditions gained least. (b) Subjects trained under conditions of noise 10 VU less severe, gained substantially more than those trained under most severe noise. (c) Subjects trained under a condition presenting a less intense noise than used in (b) above, gained substantially more than any other group. The noise used with this group consisted of garbled speech signals. (d) Two practice conditions which did not employ an interphone system produced slightly greater gains than the severe noise condition, but less than the condition presenting a reduced level of airplane noise (b). (e) Experimental subjects gained substantially more than control subjects who were given the same tests after preliminary indoctrination in use of equipment. (Author)

Descriptors :   (*SPEECH, INTELLIGIBILITY), (*SPEECH TRANSMISSION, TRAINING), NOISE, VOICE COMMUNICATIONS

Subject Categories : Humanities and History
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE