The acoustic emissions are classified into two categories. 123 HP LaserJet p1006 One is the sound power level and the other is the sound pressure level bystander position. The sound power level has printing speed with 14 papers per minute declared per ISO 9296 and the Ready or Power save sound power level is inaudible or not audible.
The next category mentioned is the sound pressure level bystander position which has again two categories printing and Ready. The printing category has 14 papers per minute with declared per ISO 9296 is LWAd = 50 dB(A) and the ready por power save mode is inuaudible.