Miyakita T, Miura H
Int Arch Occup Environ Health. 1986;57(3):173-83. doi: 10.1007/BF00405786.
Audiograms obtained from workers exposed to occupational noise were classified into six stages, namely, "normal" and stages I-V of noise-induced deafness, using the audiometric chart and the classification table designed by the authors. Close correlations were observed between the severity of the stage and the degree of hearing in daily life, which support our classification method. On the other hand, the prevalence rate of tinnitus also showed a linear increase in proportion to the severity of the stage, although the mechanism of tinnitus in noise-induced deafness has not yet been elucidated. From the viewpoint of protecting workers from hearing damage due to noise exposure, further investigation is required to make the best use of our classification method in noisy workplaces.
利用作者设计的听力图和分类表，将接触职业噪声的工人的听力图分为六个阶段，即“正常”以及噪声性耳聋的Ⅰ - Ⅴ期。观察到阶段的严重程度与日常生活中的听力程度之间存在密切相关性，这支持了我们的分类方法。另一方面，耳鸣的患病率也随着阶段严重程度呈线性增加，尽管噪声性耳聋中耳鸣的机制尚未阐明。从保护工人免受噪声暴露导致听力损伤的角度来看，需要进一步研究以便在嘈杂的工作场所充分利用我们的分类方法。
