I did shift work for several years. two weeks each of days, evenings, and midnights. My wife ran a kid care in our home with about 6 extra kids and our one. I can sleep through anything except a kid crying. Also across the street was a fire station. Nada, I slept through almost anything. The school about 2 blocks down nearly burned to the ground and almost every fire truck in town showed up. I read about it in the newspaper the next day.