If you like Science Fiction in general, or “Blade Runner” in particular, you might like this. Or maybe you just need some noise in the background as you work or sleep.
The link above gives a 12 hour . . . YES a 12 hour loop of sounds from Blade Runner. This is just one of the sound loops YouTube user Crysknife007 has created. If you visit his YouTube channel you will find several other lengthy sound recordings. I liked the 24 hour Star Trek TNG Ambient engine noise. But there is a Battlestar Galactica Ambient Engine sound recording too if that is more to your taste.