Abstract
Objective: To investigate the occupational noise exposure characteristics and distribution of workers in wood furniture manufacturing industry and textile industry, so as to provide the basis for the establishment of noise source database and the prevention and control of noise hazards in China. Methods: In March 2020, a total of 653 workers in wood furniture manufacturing industry and textile industry were selected by cluster sampling method. A general questionnaire survey was conducted to measure the characteristics of noise exposure and analyze the changes of 8 h equivalent A-level (L(Aeq, 8 h)) and kurtosis of different industries and types of work. Results: The noise exposure L(Aeq, 8 h) of workers was (91.2±6.9) dB (A) , the median kurtosis and mean kurtosis were 37.0 and 105.0, respectively. 84.1% (549/653) of the workers had L(Aeq, 8 h)≥85 dB (A) , 49.0% (320/653) and 68.5% (447/653) of the workers had median kurtosis and mean kurtosis >10. The L(Aeq, 8 h) level of the textile industry was higher than that of the wooden furniture manufacturing industry, while the median and mean of kurtosis levels of the textile industry was lower than the wooden furniture manufacturing industry (P<0.01) . The L(Aeq, 8 h) levels of spinners and weavers were higher, and the median and mean of kurtosis of nailers were higher (P<0.05) . The mean and median of kurtosis were highly correlated among workers of two industries (r=0.80, P<0.01) . The L(Aeq, 8 h) was positively correlated with mean and median of kurtosis among workers of wooden furniture manufacturing industry (r=0.33 and 0.35, P<0.01) , while it was negatively correlated with mean and median of kurtosis among workers of textile industry (r=-0.45 and -0.40, P<0.01) . Conclusion: Indicators for noise exposure characteristics, such as L(Aeq, 8 h) and kurtosis vary greatly by industries and type of works. Multi-indicator joint measurement is conducive to comprehensive assessment of noise exposure and its health effects.
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