PURPOSE: to relate the audiometric profile of bus drivers with age and time activity. METHOD: this is a retrospective Cohort study, individual, comparative, using data from the audiological evaluation of bus drivers in Porto Alegre and its metropolitan area. RESULTS: there were 1113 drivers with an average of 40.33 years and average service time of 4.16 years. Bilateral sensorineural hearing loss were found in the range of 3 to 6 KHz, with a trend of biggest change in hearing thresholds for the left ear in the range from 05 to 2 KHz. Workers with more time of service and age were the most affected, mainly in the range of high frequencies. CONCLUSION: there was a worsening in hearing thresholds at high frequencies in relation to time of service when comparing the results between the first and the last evaluation of each worker.