Self-assessment of Hearing Status and Risk of Noise-induced Hearing Loss in Workers from Rolling Stock Plant

摘要

In order to develop a hearing conservation program for rolling stock plant,noise measurements and questionnaire inquiries were carried out in workers.The subjects of the study comprised 124 employees,aged 21 59 years.They were asked to complete a questionnaire aimed at self- assessment of hearing status and identification of occupational and non-occupational risk factors of the noise-induced hearing loss(NIHL).Based on the results from noise measurements and questionnaire data,the assessment of risk of hearing impairment was performed.Workers under study were exposed to noise at A-weighted noise exposure levels varying from 74 to 110 dB during period of 1 40 years.Such exposures were associated with increased risk of NIHL.Most respondents （81.5%)were aware of exposure to excessive noise and declared usage of hearing protectors （89.5%).However,nearly every third worker noticed hearing impairment.Obtained results confirmed the need to implement the hearing conservation program in the rolling stock plant.