Oral Muzzle Pressure Effects in Underwater Communication.
FLORIDA UNIV GAINESVILLE COMMUNICATION SCIENCES LAB
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The design of most SCUBA communication equipment requires that the divertalker speak into a slightly raised air pressure to prevent back flooding at the exhaust port of the system. The study sought to determine the effect on intelligibility of speaking into such an elevated pressure. Three male and two female speakers read standard intelligibility word lists as they wore an oral muzzle adjusted to exhaust release at 0, 1, 2, 4, and 6 cmH2O re atmospheric pressure. Recorded stimuli were played to 20 listeners who identified each word as one of five choices in a closed response set. Results indicated a systematic trend for intelligibility scores to decrease with increases in muzzle release pressures. Author
- Voice Communications