Analysis on comprehensive noise control effects in an automobile engine manufacturing enterprise
10.20001/j.issn.2095-2619.20240408
- VernacularTitle:某汽车发动机制造企业噪声综合治理效果分析
- Author:
Lin CHEN
1
;
Youmei SHU
;
Yang LIAO
;
Hai ZHANG
;
Kunpeng ZHONG
;
Jun LIU
;
Fengyi OU
;
Zhi WANG
Author Information
1. Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou, Guangdong 510620, China
- Publication Type:Journal Article
- Keywords:
Automobile engine manufacturing;
Noise hazard;
Sound insulation and noise reduction;
Comprehensive treatment;
Engineering protection
- From:
China Occupational Medicine
2024;51(2):168-171
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo analyze the measures and effects of comprehensive noise control in an automobile engine manufacturing enterprise. Methods An automobile engine manufacturing enterprise with noise exposure work-sites was selected as the research subject. The noise hazard status of the enterprise was investigated. The noise hazard exceeded the national standard in work-sites was comprehensively treated. The treatment effect was analyzed. Results A total of 395 work-sites exposed to noise were detected. Among them, 16 work-sites exceeded the national noise standard, with the rate of 4.1%. The work-sites with noise exceeding the national standard were mainly in the machine workshop and the casting workshop, with normalization of equivalent continuous A-weighted sound pressure level to a nominal eight hours working day (LEX,8h) ranging from 86.8 to 89.2 and 85.2 to 90.2 dB(A), respectively. In addition, the classification of occupational noise exposure of the mold protection group in the casting workshop was level Ⅱ, and classification of occupational noise exposure of other work-sites with excessive national standard was grade Ⅰ. After the enterprise implemented noise control measures such as process reform, equipment replacement, sound insulation, noise reduction, sound absorption, and vibration isolation, the LEX,8h of nine positions were lower than those before rectification ［(86.7±1.1) vs (83.3±1.3) dB(A), P<0.01］. Conclusion The use of comprehensive control measures can achieve the purpose of reducing noise from the sources, and can be used for reference by relevant enterprises with noise hazards.
