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为了解井下噪声对矿工的听力损伤情况和恢复规律，做了井下噪声模拟动物实验。５组豚鼠分别暴露模拟井下噪声１１７ｄＢ（Ａ）１、２、４、８、和１６天，每天１小时，暴露前后不同时间分别测试皮层反应阈及脑干电反应。用扫描和透射电镜观察耳蜗毛细胞及细胞内亚显微结构改变情况。电生理结果表明，噪声暴露水平及脱离噪声时间对听阈改变均有明显影响，随着暴露时间的延长，损伤逐渐加重，从暂时性听阈位移到永久性听阈位移的不同改变过程和停止接触噪声后的阈移恢复规律。超微结构扫描和透射电镜也可观察到类似的结果，随着暴露水平的增加，内外毛细胞和细胞内结构的变化和损伤也逐渐加重，直至表皮板的改变及柯替器的崩落和内外毛细胞的广泛空化、水肿、细胞变性。提示对接触噪声工人开展听力保护的重要性
In order to understand the underground mine noise to miners hearing damage and recovery rules, do the underground noise simulation animal experiments. Five groups of guinea pigs were exposed to simulated underground noise of 117dB (A) for 1, 2, 4, 8, and 16 days respectively for 1 hour daily before and after exposure to cortical response threshold and brainstem response at different times. Scanning and transmission electron microscopy were used to observe the changes of cochlear hair cells and intracellular ultrastructures. Electrophysiological results showed that the level of noise exposure and the time from the noise had a significant effect on the change of the auditory threshold. With the extension of the exposure time, the injury gradually aggravated. From the temporary hearing threshold to the permanent change of the threshold hearing shift and the stop of the contact noise Threshold shift recovery law. Similar results were observed with ultrastructural scanning and transmission electron microscopy. As exposure levels increased, changes in and damage to the inner and outer hair cells and intracellular structures were also gradually aggravated until changes in the epidermal plateau and the collapse of the cortisol and internal and external Extensive cavitation of hair cells, edema, cell degeneration. Prompted the noise exposure workers to carry out the importance of hearing protection