Quote Originally Posted by opalwolf View Post
i tried doing this technique during everyday life as well. it is pretty strange how we drown out noises during everyday life. i feel as though we do it to stay sane. i live in chicago and there is a LOT of noise happening all the time. i can even hear the crosswalk beep from inside my apartment! so I'm glad i don't hear that all the time.

I imagine it is kind of designed to keep us from going stark raving mad. If the filter system gets broken, as it does in some rare illnesses, the patient has to live in a special sensory dampend setting.