长期噪声暴露引起听觉伤害的现象表现为听阈的提高。而对噪声的敏感性的个体差异却相当大,这就给听力保护工作带来很大的困难。在噪声引起永久性听力伤害之前,目前尚无一种精确方法能够证明噪声暴露者是否是对噪声敏感的个体。为解决这个疑点,近年来,美国环境声学研究所做了大量的工作。已证实:听阈的提高并不是噪声暴露引起听觉改变的唯一适合的指标,尤其是噪声引起听觉 Long-term noise exposure caused by the phenomenon of auditory impairment manifested as increased hearing threshold. However, the individual differences in the sensitivity to noise are quite large, which brings great difficulties to the work of hearing protection. Until noise causes permanent hearing impairment, there is currently no precise way of verifying whether noise-exposed individuals are noise-sensitive individuals. In order to solve this doubt, in recent years, the American Institute of Environmental Acoustics has done a great deal of work. It has been demonstrated that raising the hearing threshold is not the only suitable indicator of the auditory changes caused by noise exposure, especially the noise that causes hearing