OCCUPATION AND HEALTH ›› 2025, Vol. 41 ›› Issue (24): 3339-3343.

• Treatise • Previous Articles     Next Articles

Analysis of the current status of earplugs wearing comfort and its correlation with personal attenuation ratings among noise-exposed workers in manufacturing enterprises

WEN Wei1, SHU Linyan2, GUO Jianyu1, TANG Jia3, LIN Hansheng1, XIAO Bin1,3()   

  1. 1 Guangdong Province Hospital for Occupational Disease Prevention and TreatmentGuangzhouGuangdong 510300, China
    2 School of Public HealthGuangdong Medical University,DongguanGuangdong 523808, China
    3 School of Public HealthSouthern Medical University,GuangzhouGuangdong 510515, China
  • Received:2025-05-06 Revised:2025-06-29 Online:2025-12-15 Published:2026-01-22
  • Contact: XIAO Bin,Chief physician,E-mail:binny811@163.com

Abstract:

Objective To explore the current status of comfort among noise-exposed workers wearing earplugs and its relationship with personal attenuation ratings(PARs), providing a reference for enterprises and noise-exposed workers to scientifically wear earplugs. Methods From 2022 to 2023, a convenience sampling method was used to select 441 workers exposed to noise from 3 manufacturing enterprises in Guangdong Province as the research subjects, and the comfort level of their earplug wearing was investigated. According to the types of earplugs that the research subjects usually wore, the same type of probe-style test earplugs were selected for PARs tests. Generalized linear regression was used to analyze the correlation between comfort level and PARs. Results Among 441 noise-exposed workers, 297(67.3%) wore foam earplugs, and 144(32.7%) wore pre-molded earplugs. Overall discomfort was reported by 292(66.2%) workers,with "normal communication after wearing earplugs" being the most uncomfortable indicator(67.3%). In the pre-molded earplug group, the most uncomfortable indicator was "tightness of earplugs"[(3.0±1.2)points], while in the foam earplug group, it was "normal communication after wearing earplugs"[(3.0±1.1)points]. The comfort score of the pre-molded earplug group was higher than that of the foam earplug group(P<0.01), with the largest difference observed in the "softness and hardness of earplugs" indicator. Additionally, PARs testing using probe-type foam and pre-molded earplugs showed median PARs values of 15.0(4.0,20.0) and 2.0(0.0,11.8) dB, respectively. Generalized linear regression results indicated that overall earplug comfort was negatively correlated with PARs(P<0.05). Among the comfort indicators,factors such as pain,blockage, swelling,itching,normal communication after wearing earplugs, and breathability of earplugs were all negatively correlated with PARs (all P<0.05). Conclusion Noise-exposed workers experience significant discomfort when wearing noise reduction earplugs, primarily manifested as impaired normal communication, poor breathability,and sensations of pain,blockage,and swelling caused by wearing earplugs. Furthermore,there is a negative correlation between earplugs wearing comfort and PARs. It is recommended that enterprises and workers comprehensively consider both comfort and PARs of noise reduction earplugs,and scientifically select noise reduction earplugs.

Key words: Manufacturing enterprises, Noise, Earplugs, Personal attenuation ratings, Comfort

CLC Number: