Acoustics. Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room
State system for ensuring the uniformity of measurements. State verification schedule for means measuring spectral density of radiance, spectral density of radiant intensity and spectral density of irradiance in the wavelength range of 0,25 - 25,00 mu; radiant intensity and irradiance in the wavelength range of 0,2 - 25,0 mu
