The LectroFan EVO can produce 10 fan sounds and 10 ambient noise sounds, plus two ocean soundscapes, so you should be able to find one that sends you off to the Sandman. You could also use an app to do that, like Wirecutter’s pick, myNoise, but the LectroFan doesn’t require keeping your phone in your bedroom, doesn’t light up, and doesn’t send nagging text messages, all of which can actually keep you up at night.