I always believed this kind of stuff was a joke. I had a bit of a headache since last night and had little sleep. I tried everything to fall asleep to no avail. 
I came upon this video and decided to try it. I have AirPod Pros. I started listening and was thinking how stupid I was expecting weird wah wah sounds would help.
Well it did! I woke up about 3 hours later, no headache and feeling refreshed. 
Highly recommend to at least try it out. And give it time while listening!
Very cool, thanks for sharing Bettina!
Bettina MacDonald