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Thoughts on the noise "notch" and the importance of testing 8 kHz.

Authors
Stephenson-MR; Themann-CL; Murphy-WJ
Source
Update: The Newsletter of the Council for Accreditation in Occupational Hearing Conservation 2004 Oct; 16(3):1, 6
NIOSHTIC No.
20025656
Abstract
The primary purpose of audiometric monitoring is to identify hearing changes while they are still small. Hopefully, these changes can be identified before they represent permanent changes, i.e., while they are temporary threshold shifts. The susceptibility to developing a hearing loss is not the same at all frequencies. Assuming that a worker’s ears are otherwise healthy, that there is no excess build-up of cerumen, and that appropriate audiometric test methods are followed, hearing changes due to noise are first detected and grow most rapidly at the higher frequencies. The American National Standards Institute (ANSI) provides data estimating expected hearing loss as a function of noise level, years of exposure, and audiometric frequency (ANSI, 1996).
Keywords
Noise-induced-hearing-loss; Noise-frequencies; Noise-exposure; Audiometry; Monitoring-systems; Hearing-loss; Hearing-threshold; Workers; Worker-health; Noise-levels; Occupational-exposure
Publication Date
20041001
Document Type
Newsletter
Funding Type
Construction
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Issue of Publication
3
NIOSH Division
DART
Priority Area
Disease and Injury: Hearing Loss
Source Name
Update: The Newsletter of the Council for Accreditation in Occupational Hearing Conservation
State
OH
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