HP Q3728A HP LaserJet 9040mfp/9050mfp - User Guide - Page 195
Acoustical specifications
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Note Acoustical specifications Declared per ISO 9296a HP LaserJet 9050mfp Sound power level Printing/copying (49 ppm) LWAd = 7.4 Bels (A) [74 dB (A)] Ready LWAd = 5.7 Bels (A) [57 dB(A)] or essentially inaudible Sound pressure level (Bystander position) Printing/copying (49 ppm) LpAm = 58 dB(A) Ready LpAm = 39 dB(A) or essentially inaudible HP LaserJet 9040mfp Sound power level Printing/copying (39 ppm) LWAd = 7.4 Bels (A) [74 dB(A)] Ready LWAd = 5.7 Bels (A) [57 dB(A)] or essentially inaudible Sound pressure level (Bystander position) Printing/copying (39 ppm) LpAm = 58 dB(A) Ready LpAm = 39 dB(A) or essentially inaudible a.Values current as of March 2, 2004. Values subject to change, see www.hp.com/support/ lj9040mfp or www.hp.com/support/lj9050mfp for current information. Configuration tested: Base unit printing and scanning continuous with ADF on A4 paper at 49 ppm (HP LaserJet 9050mfp) and 39 ppm (HP LaserJet 9040mfp) with no output device. ENWW Environmental specifications 191