Howdy, my 11 year old son makes a multitude of peculiar sounds ranging from a soft high pitched "hmm" to a deep growl in his throat and all sounds in between, he has been continually making these noises for many years now and they are just increasing in intensity. He is completely unable to stop. Tourette's? OCD? Autism? Or just bad habits, I do not know. It's driving me up the wall!! It seems that no one I approach about the subject has any definitive answers. Open to suggestions/ remedies/ anything... Help.