强烈的噪声不仅可引起听力损伤,对神经系统、心血管系统和消化系统都有不良影响;而且,由於噪声的致疲作用,对工作效率也会产生一定的不利影响。强烈的噪声往往严重遮蔽了联系讯号、言语交谈及其他危险警报,有时甚至可引起工伤事故。噪声是铁路运输生产中主要的职业性危害因素之一,经常或比较经常接触噪声的工人为数众多,影响面广;此外,铁路的噪声也是环境保护的重要课题之一。为了贯彻毛主席“预防为主” Strong noise can not only cause hearing loss, but also have adverse effects on the nervous system, cardiovascular system and digestive system. Moreover, due to the fatigue caused by noise, work efficiency will also be adversely affected. Strong noise often severely obscures contact signals, verbal conversations and other dangerous alerts, and sometimes even incidents of work-related injuries. Noise is one of the major occupational hazards in railway transportation. There are a large number of workers with frequent or relatively frequent exposure to noise, which has a wide range of impacts. In addition, railway noise is also one of the major issues in environmental protection. In order to implement Chairman Mao’s “prevention first”