2011•Zhiye yu jiankangRequires access
Effect of Noise and Heat Exposure on Hearing of Workers in Thermal Power Plant
Hou Yu-gen
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Abstract
[Objective]To study the effect of combined effect of noise and heat exposure on hearing of workers in thermal power plant.[Methods]The field operation workers with equivalent environment conditions were selected and divided into 4 groups.The heat stress and noise levels were tested in their operation environment.Differences of hearing levels between the 4 groups were analyzed.[Results]The statistical analysis showed both speech hearing threshold and high frequency hearing threshold of the noise and heat group were obviously higher than those of the group with noise exposure only,and the difference was significant(P0.01).Compared with the control group,the significant differences of speech hearing threshold and high frequency hearing threshold existed in the group of noise only and the group with noise and heat exposure and the control group.(P0.01).There was no significant difference in speech hearing threshold and high frequency hearing threshold between the group of heat exposure only and the control(P0.05).[Conclusion]Heat stress only does not have any effect on speech hearing threshold and high frequency hearing threshold in comparing with the control,however,the combined effect of noise and heat will enhance the hearing loss.