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ORIGINAL ARTICLE
Commun Sci Disord. 2006;11(2): 106-121.
Distribution of Hearing Thresholds and Hearing Loss among Noise-exposed Workers
Kyoo Sang Kim`
Copyright ©2006 The Korean Academy of Speech-Language Pathology and Audiology
김규상(Kyoo Sang Kim)
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ABSTRACT
This study was carried out to evaluate the hearing threshold levels and hearing impairment of noise-exposed workers. We obtained health examination data of noise-exposed workers from 70 special periodic health examination agencies. The data consisted of special periodic health examination results and audiograms that had been performed in examinations during the first half of 2003. We analyzed the hearing-threshold levels and relating factors of 10,823(male: female=9,464:1,359) noise-exposed workers at 403 workplaces. Sex, age, and duration of noise exposure were significantly related to the prevalence of screening above the hearing threshold levels in the first audiometric examination. The prevalence of secondary audiometric examinees among the male workers who had more than 30dBHL of pure tone average(PTA) or 50dBHL at 4000Hz was 31.0%. Among the secondary audiometric examinees, 57.6% was above 50dBHL of 4000Hz, 12.8% was above 30dBHL of PTA, and 8.7% was classified as having noise-induced hearing loss in the right ear of the male workers. Fifteen percent of the secondary audiometric examinees in the male workers suffered from a hearing loss above the mild level as judged by the ISO standard.
Keywords: 소음 | 소음 특수건강진단 | 소음성 난청 | 청력역치 | noise | noise-induced hearing loss | hearing threshold
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