Discrete Tone Penalty - IBM DYLA-28100 - Travelstar 8.1 GB Hard Drive Specifications

5.6.2 Discrete Tone Penalty

Discrete tone penalties are added to the A-weighted sound power (Lw) with following formula only when
determining compliance.
Lwt(spec)=Lw+0.1*Pt < 4.0 (Bels)
where:
Lw : A-weighted sound power level.
Pt : Value of discrete tone penalty = dLt-6.0 (dBA)
dLt : Tone-to-noise ratio taken in accordance with ISO 7779. at each octave band.
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Specification