大型设备及其作业场所低频噪声强度及频谱分析

目的　了解大型生产设备作业场所噪声dB(A)值不高而低频强噪声存在的可能性。方法　是根据有关卫生标准及检测方法对生产设备、休息室、控制室等作业场所进行声强和频谱的测量。结果　测量发现聚苯乙烯造粒机、聚乙烯造粒机、休息室。控制室的A 计权网络的等效声级均未超过有关的标准 ,而频谱分析则发现其主要的声强级均分布在 2 0 0Hz以下。结论　提示大型生产设备作业场所存在有低频强噪声。

Study of low frequency noise intensity and noise spectrum in the working site and big scale production equipments

Objective To study the possibility of low frequency noise existed in working site of control room and big scale production equipments.Methods The sound level and frequency were measured according to the corresponding health criterion and measuring method at big production equipment, crush room, control room and workshop.Results The leq(A) did not exceed about criterion in polystyrene machine, rest room, control room, whereas most sound levels were distributed below 200 Hz by frequency analysis.Conclusion It showed that strong noise of low frequency existed in working site of big scale production equipments.