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Document ID (ISN)75404
CIS number 00-1430
ISSN - Serial title 1232-1087 - International Journal of Occupational Medicine and Environmental Health
Year 1999
Convention or series no.
Author(s) Sułkowski W., Kowalska S., Lipowczan A., Prasher D., Raglan E.
Title Tinnitus and impulse noise-induced hearing loss in drop-forge operators
Bibliographic information Apr.-June 1999, Vol.12, No.2, p.177-182. Illus. 7 ref.
Abstract Tinnitus is frequently accompanied by noise-induced hearing loss, particularly in people exposed to impulse noise. A group of 261 drop-forge operators exposed to impulses with peak levels of 135dB and 169 age-matched controls underwent otological and audiometric examination, and complaints for tinnitus in both groups were analysed. Tinnitus, most common in operators with long exposure (> 10 years), was found in 184 operators (70.4%) versus 6 (3.5%) in controls. The findings closely corresponded with the degree of impulse-noise induced hearing loss. Since the maximum audiometric notch was mostly localized at 6kHz and rarely at 4kHz, the approximate pitch of the tinnitus was related to the frequencies where hearing was most affected. It is concluded that impulse-noise induced tinnitus may be sometimes more severe in its effects than is hearing loss, thus creating an additional reason for strict hearing protection programmes.
Descriptors (primary) impulse noise; tinnitus; hearing loss; forging hammers
Descriptors (secondary) sound frequency; exposure evaluation; audiometric tests; hearing threshold; case-control study
Document type D - Periodical articles
Country / State or ProvinceUnited Kingdom; Poland
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Diseases of the ear and hearing damage
Foundries, metalcasting and forging operations