KS I ISO 11201-2021 声学.机械和设备发出的噪声.反射面上基本自由场中工作站和其他指定位置发射声压级的测定(环境修正可忽略不计)
Acoustics — Noise emitted by machinery and equipment —Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting