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Permanent threshold shift and temporary threshold shift resulting from industrial noise exposure.

Authors
Mills-JS; Walker-TL
Source
Industrial Noise Services, Inc., Palo Alto, CA 1975; :1-64
Link
NIOSHTIC No.
00117644
Abstract
The effect of noise levels of 90 decibels or higher on hearing loss was investigated in 188 employees of a canning facility. Workers exposed for 1, 5, 10, or 15 years were given audiometry tests for temporary threshold shift (TTS) and permanent threshold shift (PTS) 2 or 30 minutes after noise exposure. The TTS decreased in magnitude with increasing exposure to noise levels. In the first year of exposure to noise an average PTS of 15 decibels was experienced by workers tested at information frequencies of 3000, 4000, or 6000 Hertz and about 5 decibels in the speech frequencies of 500, 1000, and 2000 Hertz. The authors suggest that new employees be given hearing tests and that a hearing conservation program be implemented.
Keywords
NIOSH-Contract; Contract-099-72-0032; Industrial-health-programs; Industrial-hygiene; Health-surveys; Hearing-impairment; Noise-induced-hearing-loss; Noise-control
Publication Date
19750101
Document Type
Final Contract Report
Funding Type
Contract
Fiscal Year
1975
NTIS Accession No.
PB82-237736
NTIS Price
A05
Identifying No.
Contract-099-72-0032
Priority Area
Noise-induced-hearing-loss
Source Name
Industrial Noise Services, Inc., Palo Alto, CA
State
CA
Performing Organization
Industrial Noise Services, Inc., Palo Alto, California
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