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A sawmill environment: noise levels, controls, and audiometric test results.

Authors
NIOSH
Source
Appl Occup Environ Hyg 1991 Dec; 6(12):1000
NIOSHTIC No.
00204071
Abstract
NIOSH investigators were asked to investigate the effects of moving some of the equipment at a sawmill on noise levels to which the workers were exposed. Noise measurements indicated the workers were consistently exposed to noise levels in excess of the OSHA PEL of 90 decibels on the slow A-weighted scale. Engineering controls attempted by the sawmill fell into two categories. The first was enclosing the noise sources. The second type of control was the separation of operations into their own distinct buildings. The separation of the trimmer operation from the main sawmill was complete before the initial survey was completed, thereby eliminating the possibility of determining the effect of this move. Hearing tests revealed that 72.5% of the employees exhibited some degree of hearing impairment at one or more audiometric test frequencies. The mean hearing curves demonstrated a pattern associated with noise induced hearing losses, characterized by maximum hearing loss at 4 to 6 kilohertz with better hearing at adjacent higher and lower frequencies.
Keywords
NIOSH-Author; Noise-exposure; Noise-induced-hearing-loss; Sawmill-workers; Lumber-industry; Industrial-noise; Workplace-studies; Ear-disorders; Hearing-threshold; Sensory-thresholds
CODEN
AOEHE9
Publication Date
19911201
Document Type
Journal Article
Editors
Tharr-D
Fiscal Year
1992
NTIS Accession No.
NTIS Price
Issue of Publication
12
ISSN
1047-322X
Priority Area
Noise-induced-hearing-loss
Source Name
Applied Occupational and Environmental Hygiene
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