Heavy Rain and Thunder Sounds for Sleeping Black Screen

As far back as the time of our cave-dwelling ancestors, we humans have considered sounds of nature non-threatening. They’re Calming and Peaceful, and your brain uses them to block out more alarming noises.

Nature sounds are more steady and constant, rather than jarring.

Abrupt noises, by contrast, jolt you awake and bedevil your efforts to fall asleep.
A sudden ringing phone or alarm sound, however, woke participants more quickly and frequently.

And while you may think the absence of sound is the best environment for sleep, it seems that gentle nature sounds to fall asleep work much better.