This is the first time I heard that this is an issue where the brain isn't filtering out noise properly. This explains why I have had tinnitus, the sound of breathing, whooshing in the ears from my heartbeat, etc. audible to me for as long as I've been conscious and have never understood why everyone else seemed to be really disturbed by what I consider to be supremely normal. Except I also have a sensory processing disorder that makes my brain unable to filter input well so I also come off as sensitive to touch and able to pick up smells well. Because I grew up with all this though I have normalized it enough to function.