I can fall asleep without it, but have a much easier time drifting off to an audio book than I do trying to go to sleep in silence. I've gone through hundreds o

I can fall asleep without it, but have a much easier time drifting off to an audio book than I do trying to go to sleep in silence. I've gone through hundreds of books over the past few years. I tend to get ~30 min of listening in and then am out. I have a timer that cuts off playback at an hour and then the next night I can rewind to the last bit I remember.