Document Detail


The role of intermittence in PTS.
MedLine Citation:
PMID:  1880284     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
W D Ward
Related Documents :
10875394 - Temporary shift in masked hearing thresholds of bottlenose dolphins, tursiops truncatus...
2318274 - Fluorophotometric assessment of blood-retinal barrier function after white light exposu...
19165694 - Lipoic acid and 6-formylpterin reduce potentiation of noise-induced hearing loss by car...
2065834 - Influence of outer ear resonant frequency on patterns of temporary threshold shift.
15690514 - Using the axis of rotation of polar navigator echoes to rapidly measure 3d rigid-body m...
14979794 - Behavioral and neurochemical mechanisms of the action of mild stress in the enhancement...
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    
Affiliation:
Hearing Research Laboratory, University of Minnesota, Minneapolis 55414.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Auditory Fatigue / physiology*
Auditory Threshold / physiology
Chinchilla
Hearing Loss, Noise-Induced / physiopathology*
Humans
Loudness Perception / physiology
Noise, Occupational / adverse effects*
Occupational Diseases / physiopathology*
Pitch Perception / physiology
Sound Spectrography
Time Factors
Grant Support
ID/Acronym/Agency:
NS 12125/NS/NINDS NIH HHS

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


Previous Document:  Recent studies of temporary threshold shift (TTS) and permanent threshold shift (PTS) in animals.
Next Document:  Field studies: industrial exposures.