Historical
IEC 60034-9 Ed. 4.0 b:2003
Rotating electrical machines - Part 9: Noise limits
Specifies test methods for the determination of sound power level of rotating electrical machines. Provides maximum A-weighted sound power levels for factory acceptance testing of rotating electrical machines. To be used in conjunction with IEC 60034-1, IEC 60034-5 and IEC 60034-6.
International Electrotechnical Commission [iec]