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KMID : 1039220200300020185
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Journal of Korean Society of Occupational and Environmental Hygiene
2020 Volume.30 No. 2 p.185 ~ p.195
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Noise Exposure Levels of Workplaces Exposed to Noise and Rate of Exceedance of Exposure Limits
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Kim Kyoo-Sang
Sung Jung-Min
Kim Eun-A
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Abstract
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Objectives: The purpose of this study was to analyze noise exposure levels and the rate of exceedance of exposure limits in workplaces from a 2015 measurement of working environments according to area, industry, and scale of workplace and to determine changes compared to the past.
Methods: Among the 408,875 measurements of noise in working environments from 27,030 workplaces in 2015, 16,359 workplaces that were linked to special health examination data were selected as the subjects of this study. The eight-hour corrected measurements and geometric mean values of the individual noisemeasurements of the workplaces were used to calculate noise exposure levels and the exceedance rate of exposure limits.
Results: The average noise exposure level of the overall workplaces making up the subjects of this study was 83.6 dBA, and the exceedance rate of exposure limits was 15.1%. At least half of the noise measurements exceeded the exposure limits in 13.7% of the workplaces. Noise exposure levels were higher in the manufacturing industry and in smaller-scale workplaces. The exceedance rate of noise exposure limits was higher in the mining and manufacturing industries and in smaller-scale workplaces.
Conclusions: Noise exposure has shown improvements compared to the past, but the exceedance rate of exposure limits was still high, and more than half of the workers were being exposed to noise of 85 dBA or higher. Therefore, it is necessary to make more active improvements in working environments in terms ofnoise exposure.
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KEYWORD
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exceedance rate, exposure level, noise
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