Study of consequents noise on hearing threshold in Wasit textile and knitting factory

In this study, noise levels are measured in the Wasit Textile and Knitting Factory (measuring the equivalent sound pressure level). Using a sound level meter device at three sections of the factory: Textile, Knitting and Boilers. The average noise level in 12 points is about 92.98 dB, which is greater than the noise level allowed for continuous work for 8 hours a day. All of these 150 workers are brought in groups of 8 workers per week to the hearing unit at Al Karama Teaching Hospital. A hearing test is conducted to evaluate their hearing level and determine the extent of the effect of noise on the hearing threshold, after they are examined by an ear, nose and throat consultant using an otoscope device. 23 workers are excluded from the study because they are suffering from middle ear infection. Thus, the number of workers who underwent hearing testing reached 127 workers, and after conducting statistics on the data, it is found that 108 workers suffer from hearing loss in high frequencies (left ear) and 106 workers (right ear). The latest findings of this study are that noise-induced hearing loss can develop many years before the worker complains of hearing loss.