I’m not OP, but I also don’t have an internal monologue (and I don’t dream, but I can construct images in my head “on demand”). I was in my late 20s before I realized that an internal monologue was not a literary device used by authors when telling a story - and people have an internal voice.
Think of it this way: unless something is causing sound externally there is absolute silence. It’s peaceful sure, but your aware of all the little noises of things around you. One thing that can be hellish is getting a song stuck in your head ( I know several 3/4 and 5/4 melodies for just this reason).





I will always remember the CS class I took that was taught in Lisp (it was the only class in that program that used Lisp).
It convinced me I did not want to do software engineering for my career.