I sleep well and am not disturbed by the usual sounds in my house. I will wake up if there is an unusual sound, even if it's not particularly loud. When the children were young I would wake if they made a sound or were restless. I seemed to be tuned in to any sounds they made.
I am generally a light sleeper, and now am peri-menopausal so throw insomnia into the mix and I swing from can't sleep for about 3 hours a night, to sleeping but easily woken and then finally so tired from nights and nights of this that I could sleep on a washing line :)