4–11-year experienced workers has the highest risk of NIHL. It is followed by 12–19, 28–35 and 20–27. It was determined that the noise level having the highest risk is 70–79 dB(A). The age group having the highest risk of being exposed to NIHL is 37–45. It is followed by 46–54, 19–27 and 28–36. Driver and crusher workers are the job group having the highest risk being exposed to NIHL.