Lacerda Adriana, Quintiliano Juliana, Lobato Diolen, Gonçalves Claudia, Marques Jair
Communication Disorder, Universidade Tuiuti do Paraná, Curitiba, Paraná, Brazil.
Int Arch Otorhinolaryngol. 2015 Jan;19(1):22-9. doi: 10.1055/s-0034-1382098. Epub 2014 Jul 22.
Introduction Researchers studying the hearing health of forestry workers have revealed the presence of a noise-induced hearing loss (NIHL) in this population and have concluded that the vibration of the equipment, the carbon monoxide released by motors, and pesticides might also contribute to NIHL. Objective To analyze the noise exposure in the Brazilian forestry industry workers and the effects on hearing. Methods The study sample comprised 109 employees of a company that specialized in reforestation. Their participants' mean age was 35.5 years (21 to 54 years), mean tenure at the company was 3.9 years (1 to 13 years), and mean total duration of noise exposure was 12.3 years (1 to 30 years). The existing documentation reporting on the jobs risk analysis was examined, noise level was measured, and pure tone audiometry was performed in all participants. Participants were divided into three groups according to their noise exposure levels in their current job. Results Of the participants who were exposed to noise levels less than 85 dBA (decibels with A-weighting filter), 23.8% had hearing loss, and 5.5% of the participants who were exposed to noise ranging from 85 to 89.9 dBA and 11% of the participants who were exposed to noise greater than 90 dBA had audiogram results suggestive of NIHL. Conclusion The implementation of a hearing loss prevention program tailored to forestry workers is needed.
引言 研究林业工人听力健康的研究人员发现该人群存在噪声性听力损失（NIHL），并得出结论，设备振动、发动机释放的一氧化碳和农药也可能导致噪声性听力损失。目的 分析巴西林业行业工人的噪声暴露情况及其对听力的影响。方法 研究样本包括一家专门从事植树造林公司的109名员工。参与者的平均年龄为35.5岁（21至54岁），在公司的平均工作年限为3.9年（1至13年），平均噪声暴露总时长为12.3年（1至30年）。检查了有关工作风险分析的现有文件，测量了噪声水平，并对所有参与者进行了纯音听力测定。根据参与者当前工作中的噪声暴露水平将其分为三组。结果 在暴露于低于85分贝A声级（带有A加权滤波器的分贝）噪声水平的参与者中，23.8%有听力损失；在暴露于85至89.9分贝A声级噪声的参与者中，5.5%以及在暴露于大于90分贝A声级噪声的参与者中，11%的听力图结果提示有噪声性听力损失。结论 需要为林业工人实施量身定制的听力损失预防计划。
