Study on occupational noise exposure and hearing loss among firefighters

doi:10.16265/j.cnki.issn1003-3033.2025.02.1199

Abstract

Abstract:

To prevent and treat the early hearing loss of firefighters caused by occupational noise sources, the occupational noise exposure detection for firefighters was conducted, and the degree of hearing loss in firefighters was evaluated. The ratio of hearing loss in firefighters was quantified, and the relationship between the hearing test results of firefighters and occupational noise exposure was analyzed. The results indicate that the intensity of the noise source for firefighters exceeds the exposure limit of noise levels in the workplace of 85 dB(A). Among the hearing screening results of 50 firefighters, the number of people who falisd the distortion product otoacoustic emission hearing screening in both ears is 21, accounting for 42.0%, and the pass rate is significantly lower than that of normal individuals. The number of people with left/right ear pure tone audiometry hearing thresholds ≥ 26 dB is the greatest at 6 kHz, accounting for 30.0% and 26.0% at n =15 and n =13, respectively, suggesting high-frequency hearing loss in firefighters after occupational noise exposure.

Key words: occupational noise, firefighter, hearing loss, distortion product otoacoustic emission (DPOAE), pure tone audiometry

CLC Number:

X966

CUI Hongxia, WU Huili, HAO-LIU Siqi, LI Chong, WANG Chen, WEI Xinfa. Study on occupational noise exposure and hearing loss among firefighters[J]. China Safety Science Journal, 2025, 35(2): 244-248.

Figures/Tables 6

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项目	检测点/个	噪声检测峰值/dB(A)	波动范围/dB(A)
高压水枪	33	94.7	43.2~94.7
无齿锯	33	109.9	98.0~109.87
电动无齿锯	83	98.8	60.5~98.8
机动链锯	8	124.7	96.6~124.7
消防训练场	36	69.2	56.0~69.2

项目	全天等效声级 (L_Aeq,T)	一天8 h 等效声级 (L_{EX,8 h})	一天1 h 等效声级 (L_{EX,1 h})	8 h超标率/ %	1 h超标率/ %
无齿锯	100.10	100.23	101.10	17.92	7.56
电动无齿锯	89.34	89.46	90.34	5.25	-3.90
机动链锯	114.88	115.00	115.88	35.30	23.27

频率/Hz		500	1 000	2 000	3 000	4 000	6 000	8 000
左耳≥26 dB	人数	1	2	1	4	9	15	11
左耳≥26 dB	占比/%	2.00	4.00	2.00	8.00	18.00	30.00	22.00
右耳≥26 dB	人数	0	0	1	6	8	13	10
右耳≥26 dB	占比/%	0.00	0.00	2.00	12.00	16.00	26.00	20.00