I listen to audiobooks, usually of a book I've already read so that I'm not too interested in what happens next.
I have a timer set to turn off after an hour. But I often have to rewind about 55 minutes the next day to find what I can remember before I fell asleep.
Gotta remember not everyone is wired the same way or responds to stimuli the same way.
Some sounds work great for sleeping, while others not so much. It might sound paradoxical, but silence also has a noise to it. For me, the noise of silence is hit or miss for sleeping, white noise is too sharp and annoying, and nature sounds are often a bit too distracting. What I've found works best for me is rounded brown noise.