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产生的噪声。按噪声的时间分布分为连续声(continuous noise)和间断声(intermittent noise );声级波动小于3 dB(A )的噪声为稳态噪声(steady noise),声级波动大于等于3 dB(A )的噪声为非稳态噪声;持续时间小于等于0.5 s ,间隔时间大于1 s,声压有效值变化大于等于40 dB(A )的噪声为脉冲噪声( 险管理对策。 噪声职业病危害风险评价程序应符合. 行一次测量。如果设备、生产工艺、岗位人员或者维护程序发生变化影响了噪声暴露水平时,测量应在发生变化的3个�. 计算声级等。测量劳动者按额定8 h工作日或40 h工作周规格化的噪声暴露级,以确定劳动者是否需�. 移(NIPTS),dB。 此公式仅适用于H’,H 和N 的�.
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