My son does this. When you tell him to quiet down, he's very confused, so I don't think he even notices it.
My son screeches too. When he is excited he will talk super fast and not take a breath in between his words. By the time he gets to the end of his thought you can barley hear him because he has no breath to continue speaking.
Yes, my older son does this even when we are in the same room. He has been reprimanded for it many times over the years in school. Not only loud but fast too. I always have to tell him to slow down.
Sue i do that all the time yes my son talks loud the school has worked on inside out side voice
Autism adhd odd ocd. he takes adderal and depacote. they work great hes happy