Wittgens H, Kissner E
Laryngol Rhinol Otol (Stuttg). 1976 May;55(5):374-82.
It can be observed that even after severe and long-lasting occupational exposure to noise the hardness of hearing caused by that noise is usually only low or medium-grade. Therefore the question is being examined whether there are any particular causal conditions for those rare cases in which the hardness of hearing caused by noise is more than medium-grade. High noise levels and high frequencies, together with continual constrained physical posture during work, seem to be such conditions according to the statistical evaluation of a wide range of observation data. In such cases the expert is required to assume a highly critical attitude. The diagnosis and in particular the simulation and aggravation tests call for improvement by way of an objectification.
可以观察到，即使在长期严重的职业性噪声暴露之后，由该噪声引起的听力减退通常也只是轻度或中度。因此，正在研究对于那些由噪声引起的听力减退超过中度的罕见病例，是否存在任何特殊的因果条件。根据对大量观察数据的统计评估，高噪声水平和高频，以及工作期间持续受限的身体姿势，似乎就是这样的条件。在这种情况下，要求专家采取高度批判性的态度。诊断，尤其是模拟和加重测试，需要通过客观化来改进。
