Abstract
The screening audiometrical study was performed on 1346 employees of a brewery factory. The test result revealed that there was an increased threshold at 1000Hz or/and 4000Hz in 325 out of 1346 employees (24.1%). After screening audiometry, these 325 cases received conventional audiometry. Audiograms from these cases mostly showed a gradually high tone loss or c5 dip type as frequently observed in industrial deafness. As an intense noise level was observed in several plants out of 12 consisting of this brewery factory, it was concluded that the hearing loss in these 325 cases seemed to be due to industrial noise in this brewery factory. Most cases with hearing loss were the employees who have worked over 30 years under noisy condition.
