i am very sensitive to sounds as well. i am fine in a dull roar (out in public and no one is being particularly noisy so i hear everything and therefore nothing at the same time) but if i am in a quiet room or the dull roar is broken by a sudden loud noise, my concentration is completely severed from whatever i am doing and i might never be able to get back on track.

eta...
when my concentration is broken, it causes a lot of anxiety and, depending on the situation and the people around me, that can morph into either anger or depression. when i'm at home and am alone or around people who know there is something wrong with me (my husband) it turns into anger. but out in public it just turns into depression or stays as anxiety.

i can hear noises really well, and things on the extreme ends of the scales (high-pitched whistling vs. crazy sub-woofers and their bass of doom) cause pain. i can hear the hum of electricity so i know when someone has turned on an electronic device even if it is muted. i have to sleep with a fan on at night because i am such a light sleeper that a mouse could (and has) run across my floor and wake me up.