Abstract: Objective In order to ensure the occupational health of employees and reduce noise hazards,the individual fit testing of hearing protectors was carried out. Methods From August to November of the 2021,three kinds of hearing protectors were selected,and the protective effect was verified of the 501 on-duty employees from 11 departments in a automobile manufacturing enterprise in Wuhan City by the binaural protection verification system,the employee's binaural personal attenuation rating was tested. Results There were many noise-exposed positions in a automobile manufacturing enterprise in Wuhan City,accounting for about 50% of the total positions exposed to occupational hazards. The occupational health examination during the on-the-job period found that more than 150 people had abnormal hearing,accounting for about 4% of the total number of employees,and the age distribution was younger. The average one-time pass rate of 1110 earplug was 64.3% and the average one-time pass rate of all three kinds of earplugs was 31.9%. The training of earplug wearing played positive roles on correcting earplugs wearing and improving personal attenuation rating（PAR） value. A significant difference in PAR value was observed before and after the training. It was found that four employees are not suitable for the currently used 1 110 earplug. Conclusion The employees in a automobile manufacturing enterprise in Wuhan City have limited understanding of earplug protection knowledge,the one-time pass rate of earplug is relatively low,which means that relevant personnel should be trained in wearing methods and necessary education before applying hearing protectors.

Key words: Noise, Hearing protector, Personal attenuation rating, Individual fit testing