Specifications
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Lwt(spec) = Lw = 0.1Pt + 0.3 < 4.0 (Bels) where Lw = A-weighted sound power level Pt = Value of desecrate tone penalty = dLt - 6.0(dBA) dLt = Tone-to the A-weighted sound power (Lw) with ISO 7779 at each octave band. 6.7.2 Discrete tone penalty Discrete tone penalties are added to -noise ratio taken in accordance with the following formula only when determining compliance. Hitachi Travelstar 60GH & 40GN hard disk drive specifications 38
Lwt(spec) = Lw = 0.1Pt + 0.3 < 4.0 (Bels) where Lw = A-weighted sound power level Pt = Value of desecrate tone penalty = dLt - 6.0(dBA) dLt = Tone-to the A-weighted sound power (Lw) with ISO 7779 at each octave band. 6.7.2 Discrete tone penalty Discrete tone penalties are added to -noise ratio taken in accordance with the following formula only when determining compliance. Hitachi Travelstar 60GH & 40GN hard disk drive specifications 38