[. . . ] [. . . ] 9 B sound power level, LWAd) of idle mode Noise levels (the declared A-weighted sound power level, LWAd) of "HDD random 2. Power supplies — Determination of no-load power and average efficiency of active modes. eCMA-109 2nd edition (December 1987) Declared Noise Emission Values of Computer and Business Equipment: 4. Method for determination of sound power levels of equipment in reverberation test rooms; 7. [. . . ] [. . . ]