tl;dr: (Thanks to fred_dot_u) I'm looking for a gaming headset with adjustable sidetone, for use on an XBox One.
One of my kids has gotten into online gaming with friends on XBox One using a Logitech G933 headset. The problem: He can't keep his voice down. He's like the annoying phone users who become oblivious to how loud they're talking.
My wife says that my first solution – an anti-bark collar – is not acceptable.
So my second idea is to plug the headset through an adjustable microphone feedback device that adds the microphone's audio signal on top of the audio going to the earphones. As we increase that feedback level he'll not only be aware of how loud he's talking, but then if he gets too loud he'll start a feedback loop. I figure that will teach him very quickly to keep his voice down.
Does any such device exist, or can some existing device be easily adapted to this purpose?