HP 4240n HP LaserJet 4250/4350 Series - User Guide - Page 246
Acoustic emissions, Sound power and pressure level, HP LaserJet 4250 or 4350 series
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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