HP Officejet Pro 8000 - A809 - Manual (Page 119)

Acoustic emission specifications (print in Draft mode, noise levels
per ISO 7779)
Sound pressure (bystander position)
LpAd 54 (dBA)
Sound power
LwAd 6.7 (BA)
Acoustic emission specifications (print in Draft mode, noise levels per ISO 7779) 115