THE EFFECT OF NOISE-INDUCED TEMPORARY DEAFNESS UPON VOCAL INTENSITY.
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
Pagination or Media Count:
Twenty-four groups of males, six members per group, read phrases before and after 120 minutes exposure to simulated cock-pit noise. At the time of the reading a threshold measurement was secured of the readers auditory acuity at 512 c.p.s. The exposure to noise reduced the mean hearing values nine decibels and increased the vocal intensity half of this amount. The recovery in neither instance was complete after 15 minutes of silence. The trends of recovery, in so far as they progressed, were linear in both sets of measures. Vocal intensity is apparently not solely a function of the intensity of the airborne side-tone. Author