it is found out that noise level in the working environment and type of occupation can be regarded as the most important parameters. It can be said that the most risky occupation job group of the places surveyed is the drivers and this job group has high possibility of exposure to 70–79 dB(A) noise level. The drivers, especially the 46–54 years age group, are experienced NIHL. When the important interactions in the analyses are evaluated, it is found out that 4–11 years experienced crusher worker working in the stone crushing-screening plant have high probability of NIHL because of high exposure to 90–99 dB(A) noise level.