Ocean waves are a great sound for sleep and relaxation. Listen as waves curl and crash onto a beach shore with a comforting lull.
Download the White Noise app for free at https://whitenoise.app to playback thousands of relaxing sounds. The sound featured in this video is available as a free download from the White Noise Market:
http://whitenoisemarket.com/sound/ocean-waves?id=5d73fc9db51a8e12e0215c57cf5e5591
Relax. Sleep. Better.