Have you been in my head? How did you get in there?
Boy, how familiar!!! All the screaming that goes on in my head! But i've got a little button I push that makes a clear glass wall go up so that I can't hear them anymore. It's a little "trick" I made up. You have to be able to visualize, but it sounds like you're good at it.
When they get too loud, I push my "magic button" and the wall goes up. I can still see the "people" but I can't HEAR them.

They can scream all they want, but it won't do any good. Sooner or later they'll shut up cause they know I can't hear them. Then they quit screaming, and go away. That's when I can let the wall back down, until next time.
I use this all the time. I told my shrink about it, and he loved it -- he said he was going to suggest that his other patients use it too.
It works for me! MAYBE it will work for you. Hugs, Lee