Speech Intelligibility During Exercise at Normal and Increased Atmospheric Pressures
Medical research progress rept. no. 8
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
The purpose of this study was to assess the effects of work loads at increased ambient pressures on speech intelligibility. Six subjects were exposed to depths equivalent to 0, 50, 100 and 150 feet of sea water. At each depth, the subjects recorded one 25 word PB list at each of four work loads, 0, 50, 100 and 150 watts. Subjects were exercised on an ergometer and pedalling was maintained at the desired work load by monitoring a preset metronome. The recordings were played to naive listening panels to obtain speech intelligibility scores. The results indicate that at rest, speech intelligibility decreases by approximately 20 per cent from surface to 150 feet. With the addition of a work load, there is an additional drop in intelligibility however, intelligibility does not continue to decrease as work load increases.
- Voice Communications