Assessment of occupational health risk of noise in a plastic products enterprise
- Author:
ZHAN Li chun XIAO Bin YANG Ai chu GUO Jian yu LONG Tai hua XU Guo yong YAN Mao sheng LIU Mao ling
- Publication Type:Journal Article
- Keywords:
Plastic products Noise Hearing loss Occupational health Risk assessment
- From:
China Occupational Medicine
2022;49(05):553-
- CountryChina
- Language:Chinese
-
Abstract:
Objective
To assess the occupational health risk of noise in a plastic products enterprise and determine the key risk
Methods -
points. The workplace of a plastic products enterprise and its 388 noise exposed workers were selected as the
，
research subjects using a convenient sampling method. The noise intensity in the workplace of the enterprise was measured and
- GBZ/T 229.4-2012
the individual noise exposure level and pure tone hearing test were carried out in the noise exposed workers.
Classification of Occupational Hazards at Workplaces--Part 4： Occupational Exposure to Noise（ GBZ/T
hereinafter referred to as
229.4-2012） -
was used to evaluate the hazardous degree of noise in different posts. The risk of high frequency hearing loss
（ ） - （ ） - ， ，
HFHL and occupational noise induced deafness ONID in noise exposed workers in different posts at 45.0 50.0 55.0 and
WS/T 754-2016 Guideline for Risk Management of Occupational Noise Hazard（
60.0 years of age were predicted using hereinafter
WS/T 754-2016）Results
referred to as . The noise in the workplace of this plastic product enterprise was found to exceed the
-
occupational exposure limits with the rate of 46.6%. The maximum level of normalization of equivalent continuous A weighted
- （ ）
sound pressure level to a nominal 40 h working week of exposure to noise in workers of six posts was 84.0 93.0 dB A .
- ， ， ，
According to GBZ/T 229.4 2012 the noise hazards of the posts including extrusion premixing unloading and utility
- ，
maintenance were mild or moderate except for the film and packaging posts. According to WS/T 754 2016 the risks of HFHL in
， ，
the film and packaging operators at age ≥50.0 years old were at acceptable risk and the risks of HFHL in operators of extrusion
， ，
premixing unloading and utility maintenance at age ≥45.0 years old were at moderate risk or high risk. The risks of ONID for
，
the film packaging and utility maintenance operators at age ≥55.0 years old were at acceptable risk or moderate risk. The risksof ONID for extrusion premixing and unloading operators at age ≥50.0 years old were at high risk. Extrusion operators with
（ ）
exposure to toluene below the occupational exposure limit had a higher risk of HFHL high risk than unloading operators
（ ） Conclusion
moderate risk at age 45.0 years with the same noise intensity. The noise exposure intensity is high in the
，
workplace of the plastic product enterprise. The workers in posts of extrusion premixing and unloading are at high risk levels of
HFHL and ONID.
