title: A six-year follow up study for evaluation of the 85 dBA safe criterion for noise exposure.
abstract: This study included 114 workers who have been exposed to noise levels of 78 to 91.4 dBA and followed over a six year period. Workers exposed to nose levels up to 85 dBA eight hours daily for six days per week and for twelve years showed a slightly higher (1%) hearing impairment than the corresponding control subjects. Impairment of hearing among workers exposed to higher noise levels was 9.6%.
mesh_terms: D000328:Adult; D001299:Audiometry; D004534:Egypt; D005260:Female; D006317:Hearing Loss, Noise-Induced / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D008297:Male; D008452:Maximum Allowable Concentration; D009622:Noise; D009623:Noise, Occupational; D013783:Textile Industry