HP Color LaserJet 4730 Multifunction Printer series - Manual (Page 376)

Acoustic specifications
Table D-5 Sound power and pressure level 1 (HP LaserJet 4370mfp series)
Sound power level Declared per ISO 9296
Printing 2 L
WAd
= 6.7 Bels (A) [67 dB(A)]
Copying 3 L
WAd
= 6.8 Bels (A) [68 dB(A)]
Ready L
WAd
= 5.8 Bels (A) [58 dB(A)]
Sound pressure level Declared per ISO 9296
Printing 2 L
pAm
=50 dB (A)
Copying 3 L
pAm
=52 dB (A)
Ready L
pAm
=37 dB (A)
1 Values subject to change. See http://www.hp.com/support/clj4730mfp for current information.
2 HP Color LaserJet 4730mfp series speed is 30 ppm A4 size. Configuration tested (HP Color LaserJet 4730mfp): Base model,
simplex printing with A4 paper size.
3 Configuration tested (HP Color LaserJet 4730mfp) Base model, simplex copying from ADF with A4 paper size.)
356 Appendix D MFP specifications ENWW