The prevalence of NIHL was higher statistically significant with p<0.05 in males (OR = 5, 8; 95% CI 21, 17 - 16, 37); in the workers aged 50 years or over (OR= 16, 24; 95% CI 5, 93 - 46, 85; p<0, 05); in the group working time over 20 years (OR = 27, 28; 95% CI 6, 11 - 169, 70).