Here's a helpful video to show you how to control your phone calls with Tap Touch:
Short Tap: A quick, short tap on the left hearing aid will answer a call and mute a call.
Short Tap: A quick, short tap on the left hearing aid will answer a call and mute a call.
Long Tap: a long hold (2 seconds) on the left hearing aid will reject/hang up the call.
You can find the tap touch information under the About section of the HP Hearing App, select Tap Touch.