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Med Lav. 2019 Aug 26;110(4):304-311. doi: 10.23749/mdl.v110i4.8214.
The present study evaluates a training program for fitting different hearing protection devices (HPDs) based on personal attenuation rating (PAR) before, immediately after, and six months after training.
A total of 67 workers from a public university in the city of São Paulo, Brazil, were invited to participate in the measurement of PARs for foam and silicone protectors through the 3M™ E-A-Rfit Validation System. Two evaluations were performed for each protector at each sampling date: one after reading printed material (the package instructions) and another after being trained by an audiologist. The same procedures were repeated after six months. The final sample consisted of 30 individuals. ANOVA was used for statistical analysis.
Larger PAR values were observed after training by the audiologist, and smaller values were observed after six months. Then, after re-training, the values increased again. There were no statistically significant differences in PAR among the HPDs tested. Even after the two training sessions, 23 to 27% of the subjects did not obtain adequate PAR values.
These findings emphasize the need for continual worker training in the correct fit of earplug HPDs and the importance of longitudinal PAR monitoring. In addition, some workers, despite the training provided, did not adapt to the HPDs used. Therefore, it is essential that other protection methods and/or other HPD types are made available to these individuals.
本研究评估了一种基于个人衰减评级（PAR）的不同听力保护装置（HPD）适配培训计划，分别在培训前、培训后即刻和培训后六个月进行评估。
邀请了来自巴西圣保罗市一所公立大学的 67 名工人参与 3M™ E-A-Rfit Validation System 对泡沫和硅树脂保护器的 PAR 进行测量。在每个采样日期对每个保护器进行两次评估：一次在阅读印刷材料（包装说明）后进行，另一次在接受听力学家培训后进行。六个月后重复相同的程序。最终样本包括 30 人。采用 ANOVA 进行统计分析。
经过听力学家的培训后，PAR 值增大，六个月后则减小。然后，经过重新培训，数值再次增加。测试的 HPD 之间的 PAR 没有统计学上的显著差异。即使经过两次培训，仍有 23%至 27%的受试者无法获得足够的 PAR 值。
这些发现强调了需要对工人进行持续的 HPD 适配培训，以及对纵向 PAR 监测的重要性。此外，尽管提供了培训，一些工人仍无法适应使用的 HPD。因此，为这些工人提供其他保护方法和/或其他 HPD 类型至关重要。
