Turning the Device Tones On and Off
You can enable the bike computer to play a tone when you press a device button. This setting also turns on and off tones when pressing on-screen buttons.
NOTE:
This device tone setting is available only on the Edge® Explore 3 bike computer. You can turn off device tones on the Edge Explore 3 Plus bike computer in the sound settings (Sound Settings).
Select 
> Settings > System > Tones.
> Settings > System > Tones.