Leigh Anne mentioned that her baby girl is a light sleeper...I guess we could start there.
Do you have white noise? When I put Leo to bed I put him down with a fan going in his room. It blows against a wall. It serves two purposes...first, white noise to block out other sounds around our small house, and second as prevention against SIDS. A new study is out showing how SIDS risk is reduced by up to 75% when a baby's room is well ventilated by an open window or fan.