I needed scientific evidence that listening to this work.  
So I tested it on myself out side of the laboratory and in real life conditions

1) jogging through a dangerous neighborhood
2) driving for Uber
3) skydiving
4) showering  in  prison
5) feeding lions at the zoo

--------------------conclusion ----------------------

Unfortunately, the original poster could not post his findings.  

As a friend who has witness his experiments, I can safely say the sound waves work!  He has permanently fallen asleep.
Clearly, this is the best comment ever posted in the history of YouTube. (I would pin it but then I'd have people asking the same questions over and over again...)
happios