Accession Number : AD0638355
Title : AN EXPERIMENTAL COMPARISON OF 5 CONDITIONS FOR VOICE COMMUNICATION TRAINING.
Corporate Author : PURDUE UNIV LAFAYETTE IND
Personal Author(s) : Kelly,J. C. ; Mason,Harry M.
Report Date : 08 AUG 1947
Pagination or Media Count : 60
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. Comparison of increases in word-intelligibility of experimental and control subjects shows that: (a) Subjects which practiced under the most severe noise condition gained least. This most severe condition was the same as the test condition used to evaluate training of all groups. (b) Subjects trained under conditions of noise 1OVU less severe, gained slightly 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 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. The most severe condition was designed to approximate conditions widely used for training aircrew members in voice communication skills during World War II. All conditions were below the middle of the adjustment range provided on Device 8-I, and were considerably below the threshold of feeling. (Author)
Descriptors : (*SPEECH, TRAINING), (*TRAINING DEVICES, SPEECH), (*VOICE COMMUNICATIONS, TRAINING DEVICES), SPEECH TRANSMISSION, NOISE, AIRCRAFT NOISE, INTELLIGIBILITY
Subject Categories : Humanities and History
Distribution Statement : APPROVED FOR PUBLIC RELEASE