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为观察铁路蒸汽机车噪声对机车乘务人员听觉的损伤、以便今后采取预防措施。于1981年5～7月对沈阳铁路局苏家屯机务段前进型蒸汽机车乘务员进行了体检调查,并用ND_2型精密声级计对机
To observe the railway steam locomotive noise locomotive crew auditory damage in order to take preventive measures in the future. In 1981 from May to July of Shenyang Railway Bureau Sujiatun locomotive steam locomotive forward steam locomotive conducted a medical examination and ND2-type precision sound level meter on the machine