HP Officejet J3680 All-in-One Printer - Manual (Page 165)

• Sending black-and-white fax: LpAd 40 (dBA)
• Idle: LpAd 21 (dBA)
• Sound power
•
Color printing: LwAd 5.5 (BA)
• Black-and-white printing and copying: LwAd 5.9 (BA)
• Black-and-white printing (Fast mode): LwAd 6.4 (BA)
• Sending black-and-white fax: LwAd 5.3 (BA)
• Idle: LwAd 3.3 (BA)
Acoustic emission specifications (noise levels per ISO 7779) 161