GB/T 17248.4-1998
聲學(xué) 機器和設(shè)備發(fā)射的噪聲 由聲功率級確定工作位置和其他指定位置的發(fā)射聲壓級
Acoustics--Noise emitted by machinery and equipment-- Determination of emission sound pressure level at a workstation and at other specified position from the sound power level
GBT17248.4-1998, GB17248.4-1998