If my memory serves correctly, this is the thing that basically plays everything you say back to you with a 200ms delay that instantly makes you feel awkward.
Oh god. If I hear myself through people's speakers when on a call I cannot continue. It's super effective at making me confused and distracted. That's awful.
Whenever I run into that problem I just pull the earpiece away from my ear when I’m talking. I can still kind of hear it, but it’s much easier to ignore.