Relationship between Occupational Noise Exposure and Hearing Loss in Enterprises Directly under Huizhou City

[Objective]To study the effect of noise exposure on hearing loss in workers of the work places.[Methods]Using cross-sectional study,the noise exposure of the work places was investigated in 8 factories(including hardware industry,printing industry,food industry and electronic industry) directly under Huizhou city,and occupational health investigation and pure tone audiometry were conducted in workers exposed to noise.164 office employees who did not have contact with noise were chosen as the control group.[Results]The hearing loss rate increased with the working age exposed to noise and noise intensity,which showed an obvious time-dose-response relationship.The hearing loss rate of the noise and toxicant exposure group was significantly higher than that of the noise exposure group(P0.05).[Conclusion]The noise intensity and working age exposed to noise are the main factors that influence workers' hearing,and toxicant combined with noise could aggravate the hearing loss.