DIN EN ISO 5135:2020 声学. 在混响试验室中测定空调终端设备、空调终端单元、阻尼器和调节阀门的噪声功率级
Acoustics - Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room (ISO 5135:2020); German version EN ISO 5135:2020