Document Detail

The role of intermittence in PTS.
MedLine Citation:
PMID:  1880284     Owner:  NLM     Status:  MEDLINE    
Exposure of chinchillas to noise that is continuous results in auditory damage that is a function of the total energy of the exposure, provided that a critical exposure is not exceeded. Breaking a continuous exposure into 45 exposure periods given once a day Monday through Friday for 9 weeks (an interrupted exposure) is shown to result in a slight reduction in damage, but breaking each of the 45 daily exposures into short noise bursts presented at regular intervals (interrupted and intermittent exposures) reduces the damage more significantly. The shorter the noise bursts, the greater will be the reduction in damage. Too few data are available to establish a principle that will predict correctly the amount of reduction afforded by a particular temporal pattern; while the "equal energy" principle predicts no reduction at all, the "mean level" principle derived from studies of temporary threshold shifts (e.g., a noise at 80 dB half the time and at 100 dB half the time has a mean level of 90 dB and will have the same effect as a continuous 90-dB noise) predicts too much reduction.
W D Ward
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  90     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  1991 Jul 
Date Detail:
Created Date:  1991-10-01     Completed Date:  1991-10-01     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  164-9     Citation Subset:  IM    
Hearing Research Laboratory, University of Minnesota, Minneapolis 55414.
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MeSH Terms
Auditory Fatigue / physiology*
Auditory Threshold / physiology
Hearing Loss, Noise-Induced / physiopathology*
Loudness Perception / physiology
Noise, Occupational / adverse effects*
Occupational Diseases / physiopathology*
Pitch Perception / physiology
Sound Spectrography
Time Factors
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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