HP Color LaserJet 5550 Printer series - Manual (Page 277)

Acoustic emissions 1, 2
Sound Power Level Declared Per ISO 9296
Printing (28 PPM)
Ready
L
WAd
=6.6 Bels (A) [66 dB (A)]
L
WAd
=4.9 Bels (A) [49 dB (A)]
Sound Pressure Level - Bystander Position Declared Per ISO 9296
Printing (28 PPM)
Ready
L
pAm
=49dB (A)
L
pAm
=33 dB (A)
1 Values current as of January 25, 2004. Values subject to change, see http://www.hp.com/
support/clj5550 for current information.
2 Configuration tested: Base unit printing A4 monochrome from standard tray.
ENWW Acoustic emissions 1, 2 263