Accession Number : AD0611447

Title :   INTELLIGIBILITY TESTS OF AUTOMATIC BROADCASTS VS. LIVE MESSAGES.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY NJ

Personal Author(s) : McCormick, Malcolm Y. ; Sarlanis, Kiriako

Report Date : OCT 1964

Pagination or Media Count : 27

Abstract : A variety of electro-mechanical means for automatic voice transmission are being explored. These devices range from the broadcasting of ordinary tape-recorded routine information through elaborately engineered apparatus that will accept and store digitally teletype reports and, at prescribed intervals, draw on a stored vocabulary to prepare a series of voice messages for audio transmission. The paper describes an attempt to compare the intelligibility of such an electro-mechanical device with the intelligibility of a 'live' communicator. Tapes were prepared with ten standard messages on each. The tape played for eight subjects had the first five messages recorded from a live communicator and the second five 'canned.' The other tape heard by eight additional subjects reversed the procedure with the previously live messages now heard canned and vice versa. Overall mean scores were 70 percent correct for canned messages and 76 percent correct for live. This difference is statistically significant. The preliminary model of an automatic communicator was found to be inferior in intelligibility. (Author)

Descriptors :   *VOICE COMMUNICATIONS, *INTELLIGIBILITY, *SPEECH, SOUND REPRODUCTION SYSTEMS, AUTOMATIC, NOISE, SOUND TRANSMISSION, SPEECH REPRESENTATION, COMMAND AND CONTROL SYSTEMS, PERSONNEL, VOCABULARY, CORRELATION TECHNIQUES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE