自使用蒸汽机车以来,机车乘务人员就受到机车噪声其中包括相当强的低频噪声的影响。而内燃机车问世后,这种作用就更突出。前人的研究已证实:某一频率的次声和低频噪声相当强时,即达到85至155dB以上,就会引起人体的不良反应。主要表现为头晕、恶心,眼震颤,头痛,不安,以及暴露后的疲劳等不同形式的症状。 Since the use of steam locomotives, the locomotive crew has been affected by locomotive noise, including rather strong low frequency noise. After the advent of diesel locomotives, this role is even more prominent. Previous studies have confirmed that: when a certain frequency of infrasound and low-frequency noise is quite strong, that is, more than 85 to 155dB, it will cause adverse reactions to the human body. Mainly manifested as dizziness, nausea, nystagmus, headache, restlessness, and post-exposure fatigue and other forms of symptoms.