Huh, Do YOU hear voices when riding? MAYbe you have your Wireless Bluetooth headset ON and dont know it. And maybe IT just connected with some other riders in the area, OR folks you are riding with AND YOU didn’t KNOW that your headset had the “MESH NETwork” capability.
Well, those headsets are constantly evolving and adding new features so if you HAVE one you better keep up.
Capabilities Come with Cost $$$, so study up when getting this type gear.
Here is a short primer and there is LOTS more info out there. Gear up your knowledge before you spend Large $$
AND, here is even more comparative info: