IBM DTNA-22160 Hard Drive Specifications - Page 37
Discrete Tone Penalty - specs
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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+0.3 < 4.0 (Bels) where: Lw Pt dLt : A-weighted sound power level. : Value of discrete tone penalty = dLt-6.0 (dBA) : Tone-to-noise ratio taken in accordance with ISO 7779. at each octave band. Specification 29
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+0.3 <
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.
Specification
29