Acoustics - Measurement of airborne noise emitted by rotating electrical machinery, Part 1: Engineering method for free-field conditions over a reflective plane
声学旋转电机发出的空气噪声测量第1部分:反射面上自由场条件的工程方法
Specifies an engineering method for measuring the sound pressure levels on a rectangular parallel piped surface enveloping the machine and for calculating sound power level produced by the machine. Applies to the rotating electrical machines, such as motors, and generators (d.c. and a.c.) without any limitations on the output voltage but with the limit of the linear dimensions not to exceed 15 m. Identical with and reproduced from ISO 1680-1.