An Iranian study shows a reduced ability to hear among the tile and ceramic industry workers, caused by noise in the workplace
The researchers studied a population of 555 young workers who were exposed to noise during their eight hour shift. Hearing tests showed that the workers’ hearing threshold had increased during the two years – most frequently observed at 3000, 4000, and 6000 Hz.
The standard threshold shift was observed in 13 (2.34%) in the first year and 22 (3.96%) in the second year in the right ear and 49 (8.83%) and 63 (11.35%) in the left ear of the subjects in the first and second years of follow-up. Most affected were the workers with the highest exposure to noise.READ MORE