The sound of silence. I don’t mean Simon & Garfunkel, and I definitely don’t mean Disturbed (though, it’s a good cover).

Honestly though, I can sleep to whatever. My younger brother used to sleep to death metal. I’m not kidding. It was annoying for about a week. We’ve had noisy neighbors and my wife will ask if she should go yell at them or something when I’m about to go to bed (she stays up all night, I wake up early). I say nope, it’s not an issue. And it never has been. I don’t think I can sleep to a baby crying or a shrill alarm though. Anything high pitched. I’m pretty sure I even fell asleep to loud sex one time. As I was drifting off, I could have sworn I heard moaning and thumping. I remember having a bit of a chuckle over that. Hot college girl used to live next door, she’s getting railed TF out of like 2 feet away through a wall, and she’d be embarrassed if I saw her in her underwear (I never tried to look, just saying). But you don’t really think, there’s another room right there, another bed up against the same wall, and somebody who always leaves before the sun comes up is probably in there. So yeah, anyway, I’m a heavy sleeper.