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Human Temporary Threshold Shift From 16-Hour Noise Exposures

Human Temporary Threshold Shift From 16-Hour Noise Exposures Abstract Existence of an asymptotic development of change in threshold hearing sensitivity from long noise exposures has important implications for estimating the hazards of environmental and industrial noise. The present study investigated temporary threshold shift (TTS) resulting from 16 hours of continuous exposure to an octave band of noise, 300 to 600 Hz, at octave band levels of 80, 85, 90, and 95 dB. Ten subjects were tested at each level. Thresholds were measured at frequencies ranging from 125 to 8,000 Hz during and after the noise exposure. Group data indicate that the 16-hour exposure period was not long enough to clearly establish asymptotic levels of TTS. As a group, these subjects recovered to within 5 dB of preexposure threshold measures by 58 hours postexposure. Individual subject variability was notable in the pattern of TTS development. References 1. Kryter KD: Hazardous exposure to intermittent and steady-state noise . J Acoust Soc Am 39:451-464, 1966.Crossref 2. Botsford JH: Theory of TTS . J Acoust Soc Am 44:352, 1968.Crossref 3. Carder HM, Miller JD: Temporary threshold shifts produced by noise-exposure of long duration . Trans Am Acad Ophthalmol Otolaryngol 75:1346-1354, 1971. 4. Mills JH, et al: Temporary changes of the auditory system due to exposure to noise for one or two days . J Acoust Soc Am 48:524-530, 1970.Crossref 5. Mills JH, Talo SA: Temporary threshold shifts produced by exposure to high frequency noise . J Speech Hear Res 15:624-631, 1972. 6. Kryter KD: Exposure to steady-state noise and impairment of hearing . J Acoust Soc Am 35:1515-1525, 1963.Crossref 7. American National Standard Specifications for Audiometers , S3.6-1969. New York, American National Standards Institute Inc, 1969. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Otolaryngology American Medical Association

Human Temporary Threshold Shift From 16-Hour Noise Exposures

Archives of Otolaryngology , Volume 100 (3) – Sep 1, 1974

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Publisher
American Medical Association
Copyright
Copyright © 1974 American Medical Association. All Rights Reserved.
ISSN
0003-9977
DOI
10.1001/archotol.1974.00780040188006
Publisher site
See Article on Publisher Site

Abstract

Abstract Existence of an asymptotic development of change in threshold hearing sensitivity from long noise exposures has important implications for estimating the hazards of environmental and industrial noise. The present study investigated temporary threshold shift (TTS) resulting from 16 hours of continuous exposure to an octave band of noise, 300 to 600 Hz, at octave band levels of 80, 85, 90, and 95 dB. Ten subjects were tested at each level. Thresholds were measured at frequencies ranging from 125 to 8,000 Hz during and after the noise exposure. Group data indicate that the 16-hour exposure period was not long enough to clearly establish asymptotic levels of TTS. As a group, these subjects recovered to within 5 dB of preexposure threshold measures by 58 hours postexposure. Individual subject variability was notable in the pattern of TTS development. References 1. Kryter KD: Hazardous exposure to intermittent and steady-state noise . J Acoust Soc Am 39:451-464, 1966.Crossref 2. Botsford JH: Theory of TTS . J Acoust Soc Am 44:352, 1968.Crossref 3. Carder HM, Miller JD: Temporary threshold shifts produced by noise-exposure of long duration . Trans Am Acad Ophthalmol Otolaryngol 75:1346-1354, 1971. 4. Mills JH, et al: Temporary changes of the auditory system due to exposure to noise for one or two days . J Acoust Soc Am 48:524-530, 1970.Crossref 5. Mills JH, Talo SA: Temporary threshold shifts produced by exposure to high frequency noise . J Speech Hear Res 15:624-631, 1972. 6. Kryter KD: Exposure to steady-state noise and impairment of hearing . J Acoust Soc Am 35:1515-1525, 1963.Crossref 7. American National Standard Specifications for Audiometers , S3.6-1969. New York, American National Standards Institute Inc, 1969.

Journal

Archives of OtolaryngologyAmerican Medical Association

Published: Sep 1, 1974

References

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