Temporary auditory‐threshold shifts induced by exposures to continuous tones in water
نویسندگان
چکیده
منابع مشابه
Induced by Twenty - Five - Minute Continuous Exposures to Intense Tones in Water
Four bare-headed divers were exposed for twenty-fiv.. .minutes to continuous tones in water at frequencies of 700,'1400, and 5600 hertz at estimated sound pressure levels between 153 and 165 decibels (cß) above 20 micropascal. Subsequent analyses revealed that the eight ears involved were actually exposed to average sound pressure levels between 143.1 and 165.1 dB. These exposure levels are com...
متن کاملTen - Minute Exposures to Continuous Tones in Water
Four divers were exposed successively for ten minute periods to pure tones of 5600, 1400, and 700 hertz (Hz) (in that order) in air at 100 decibels above 20 raicropascal and in water at various sound pressure levels between 125 and 150 decibels above 20 micropascal. Divers incurred moderate temporary auditory-threshold shifts (TTS) from all exposures. Equivalent amounts of TTS are produced in w...
متن کاملTemporary Auditory - Threshold Shifts Induced
Four divers were exposed successively for ten minute periods to pure tones of 5600, 1400, and 700 hertz (Hz) (in that order) in air at 100 decibels above 20 raicropascal and in water at various sound pressure levels between 125 and 150 decibels above 20 micropascal. Divers incurred moderate temporary auditory-threshold shifts (TTS) from all exposures. Equivalent amounts of TTS are produced in w...
متن کاملTemporary threshold shifts produced by exposure to low-frequency noises.
Groups of human subjects were exposed for 8 or 24 h to an octave-band noise centered at 63, 125, or 250 Hz. For a 24-h exposure at 84 dBA, temporary threshold shifts (TTS) increased for 8-12 h and then either decreased or remained constant. Although TTS was less than 20 dB, complete recovery for many of the subjects required as long as 48 h. Accordingly, the higher level exposure which was plan...
متن کاملUnderwater Hearing in Man
Six men were subjected to 3500 Hertz pure tones of 1250 millisecond pulse length repeated every 2. 5 seconds for a period of 15 minutes at Sound Pressure Levels of 168 and 178 decibels re .0002 dynes per square centimeter. Temporary Threshold Shifts were measured and compared to temporary threshold shifts induced by similar exposures at lower levels in air in a second group of five men. It was ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1986
ISSN: 0001-4966
DOI: 10.1121/1.2023627