I have slight tinnitus. I can only hear the "eeee's" when it's really quiet. The computer fan is enough to block it out right now. After listing to really loud music it becomes much more noticeable, but still ignorable, and settles down after a bit. I don't think its ever kept me awake. You could probably use it as a way to help WILD--keep focussing on the eeee's and sing along with it in your mind to keep your mind active.

D