HP Color LaserJet 4700 Printer series - Manual (Page 308)

Acoustic emissions
Sound Power Level Declared Per ISO 9296
Printing (31 ppm letter) 1, 2, 3
Ready
L
WAd
=6.7 Bels (A) [67 dB (A)]
L
WAd
=4.7 Bels (A) [47 dB (A)]
Sound Pressure Level - Bystander Position Declared Per ISO 9296
Printing (31 ppm letter) 1, 2, 3
Ready
L
pAm
=50 dB (A)
L
pAm
=31 dB (A)
NOTE 1 Values are subject to change. See http://www.hp.com/support/clj4700 for current
information.
2 Configuration tested: Base printer, simplex printing on A4 paper.
3 HP Color LaserJet 4700 speed: 31 ppm letter and 30 ppm A4 paper.
292 Appendix D Printer specifications ENWW