I must have noise when I sleep. However, CD and TV must be off (I have both in my room). I need the sound of cars. It sounds crazy to others, but when you live near the turnpike for 16 years, cars are what gets ya. I can't fall asleep at camp, or in other places nearly as easy, I have to hear cars in the background. (Yep, lets all point and go "Brad needs some help" in big group).