Epidemiology / Occupational Health / Metallurgy / Brazil / Noise Induced Hearing Loss / Humans / Rio de Janeiro / Male / Hearing Loss / Aged / Prevalence / Middle Aged / Questionnaires / Adult / Occupational Exposure / Public health systems and services research / Time Factors / Occupational Diseases / Cross sectional Study / Cross Sectional Studies / Logistic Models / Audiometry / Humans / Rio de Janeiro / Male / Hearing Loss / Aged / Prevalence / Middle Aged / Questionnaires / Adult / Occupational Exposure / Public health systems and services research / Time Factors / Occupational Diseases / Cross sectional Study / Cross Sectional Studies / Logistic Models / Audiometry