HP Officejet Pro 8100 ePrinter - N811a N811d - Manual (Page 104)

Acoustic emission specifications
Print in Draft mode, noise levels per ISO 7779
•
Sound pressure (bystander position)
LpAm 57 (dBA) (mono Draft print)
• Sound power
LwAd 7.1 (BA)
Appendix A
100 Technical information