Evaluation of the first two audiometric examinations among metallurgy workers

Vagner Antonio Rodrigues da Silva; Alexandre Caixeta Guimaraes; Arthur Menino Castilho; Agricio Nubiato Crespo

Volume : VIII, Issue : III, March - 2018

Evaluation of the first two audiometric examinations among metallurgy workers

Vagner Antonio Rodrigues Da Silva, Alexandre Caixeta Guimaraes, Arthur Menino Castilho, Agricio Nubiato Crespo

Abstract :

It is estimated that 10% of the world’s population is exposed to potentially harmful sound pressure levels. The objective: to compare admission and initial periodic pure–tone audiometry examinations at frequencies of 250, 500, 1000, 2000, 3000, 4000, 6000 e 8000 Hz, among metallurgy workers. Methodology: Cross–sectional historical cohort. The mean value of theresholds in the all frequencies was calculated, regarding their right and left ears and each type of examination: at admission and first periodic examinations. Results: 1,382 workers were evaluated. There was an increase in audiometry thresholds over time, between the admission examinations and periodic examinations Statistically significant difference was observed in compå the admission examination with subsequent the most of periodic examinations. Conclusion: Metallurgy workers exposed to occupational noise had a statistically significant worsening in the audiometric thresholds in all frequencies evaluated, except for 6000 Hz