How do high pitched frequencies affect the brain?

[Trevor]

I have been wondering for a while now, how do high pitched frequencies efect the brain. When I listen to the atatched file I feel a nice tingly sensation in the back lower part of my head and an almost massage like feeling pulsing threw my head. This sensation to most people is horible and makes then squench. Me, i love it. I can listen to it for hours on end. Infact im listening to it right now. Maybe this is just because im autistic but i dont know. I am asking you, if you can find anymore information on this to help me understand. Thanks for reading and i hope to hear back soon. thanks