|Document ID (ISN)||61643|
|ISSN - Serial title
||0271-3586 - American Journal of Industrial Medicine
|Convention or series no.
||Five-year follow-up study of hearing loss at several locations within a large automobile company
||July 1993, Vol.24, No.1, p.41-54. Illus. 30 ref.
||This longitudinal epidemiologic study was designed to investigate hearing loss over a five-year period among noise-exposed employees of a large automobile company and to assess effectiveness of hearing conservation programmes at locations representing a large spectrum of operations. Methodology based on computerized audiometric test data was developed for measuring occupational hearing loss and evaluating programmes at these locations, which had maximal 8-hr time-weighted average (TWA) noise exposures of 104-110dB(A). The methods take account of age and hearing level of study subjects at baseline audiogramme and clearly demonstrate the extent of hearing loss during the study period. Among five study locations, the average hearing loss at 2,000-4,000Hz in the worst-loss ear ranged from 3.4 to 6.2dB over the follow-up period after adjustment for presbycusis, the loss was less than 2dB at all but one location, which showed a loss of nearly 4dB. Hearing conservation programmes at four of the five locations were judged to be effective.
||noise; hearing loss; expertise; motor vehicle industry; exposure evaluation
||epidemiologic study; programme evaluation; cohort study
||D - Periodical articles
|Country / State or Province||USA|
|Broad subject area(s)
||Diseases of the ear and hearing damage
Motor vehicle manufacturing industry