What happened to all the other posts?
BTW what you described Paz, that's how I have felt too...I forgot about stuff like super high pitches but OMG I notice it too. Every appliance that was on I heard it's super sonic high pitched humming. That buzzed feeling, every nerve is aware and lit up with electricity, sometimes I just can't stand it and I bust out laughing.
I here this sound too!!!!!!
YAY i'm not the only one!!! Ever since i was little i could here in another room if the tv was on in the living room....or a radio was on.....its like a high pitched screetchy sound with a little crackle to it...hard to describe.