EN 25135:1991 声学.通过混响室中测量气路终端设备.高/低速度/压力装置、阻尼器和阀门的噪音音响功率级
Acoustic; determination of sound power levels of noise from air terminal devices, high/low velocity/pressure assemblies, dampers and valves by measurement in a reverberation room (identical with ISO 5135:1984)