This is a cross‐sectional study on the workers of the tile industry during a 1‐year period from 1 October 2007 till 1 October 2008 in Yazd, Iran. Subjects were selected from two groups of workers: 40 office workers (80 ears) without exposure to industrial noise (group 1) and 80 industrial workers exposed to more than 85 dB noise. These subjects were exposed to a continuous noise, with an average intensity of 92 dB. The subjects of this group were subdivided into two groups: 42 workers (84 ears) free from hearing loss (group 2) and 38 subjects (76 ears) suffering from NIHL (group 3).