Acoustic emissions

Sound power and pressure level1 (HP LaserJet 4250 or 4350 series)

Sound power level

Declared per ISO 9296

Printing2 (HP LaserJet 4250)

LWAd= 6.9 Bels (A) [69 dB(A)]

Printing2 (HP LaserJet 4350)

LWAd= 7.1 Bels (A) [71 dB(A)]

Ready (HP LaserJet 4250)

LWAd= 4.0 Bels (A) [40 dB(A)]

Ready (HP LaserJet 4350)

LWAd= 3.8 Bels (A) [38 dB(A)]

Sound pressure level

Declared per ISO 9296

Printing2 (HP LaserJet 4250)

LpAm= 62 dB (A)

Printing2 (HP LaserJet 4350)

LpAm= 64 dB (A)

Ready (HP LaserJet 4250)

LpAm= 26 dB (A)

Ready (HP LaserJet 4350)

LpAm= 26 dB (A)

1Values subject to change. See http://www.hp.com/support/lj4250 or http://www.hp.com/ support/lj4350 for current information.

2HP LaserJet 4250 speed is 43 ppm A4 size. HP LaserJet 4350 speed is 52 ppm A4 size.

3Configuration tested (HP LaserJet 4250): Base printer, simplex printing with A4 paper size.

4Configuration tested (HP LaserJet 4350): Base printer, simplex printing with A4 paper size.

234 Appendix C Specifications

ENWW

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HP 4250/4350 manual Acoustic emissions, Sound power level Declared per ISO, Sound pressure level Declared per ISO