Analysis on noise spectrum characteristics and noise prevention measures for a washing equipment manufacturing enterprise in Guangzhou City
Objective To understand the noise intensity and spectrum characteristics of a washing equipment manufacturing enterprise in Guangzhou City,analyze the reasons for excessive noise,and provide support for noise hazard prevention and control.Methods In July 2022,a occupational hygiene on-site survey was conducted on a washing equipment manufacturing enterprise in Guangzhou,the equivalent sound level and noise spectrum of employees during work were measured and analyzed by individual testing and fixed-point testing.Results The LEX,8h of employees in different positions of a washing equipment manufacturing enterprise ranged from 80.3-101.1 dB(A),with a noise exceeding rate of 71.4％.The positions such as lathes,drilling machines,hydraulic press operations,CNC punching machines,plate cutting,bending had high noise exposure at low and medium frequencies.All welding positions were mainly subject to medium and high frequency noise.The washing machine assembly positions mainly focused on medium and low noise.The noise spectrum characteristics of mobile positions such as boiler operation,equipment testing,forklift operation,and quality inspection were similar,with medium to low frequency noise being the main source.Conclusions The noise exposure level of noise work positions in this enterprise exceeds the standard,and the noise hazards are relatively serious.The noise exhibits broadband spectral characteristics of low,medium,and high frequencies.Measures such as improving processes,engineering control,organizational management,individual protection,and hearing protection plans should be taken to protect employees'hearing health.
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