Explanation of video: https://www.youtube.com/watch?v=UHTF1-IhuC0

Explanation of how we hear sound (Vihart): https://www.youtube.com/watch?v=i_0DXxNeaQ0

Also there's Mongolian throat singing. This is the method I've heard before with more of a raspy drone - I hadn't heard such a clear drone before I saw this video: https://www.youtube.com/watch?v=qx8hrhBZJ98

Different kinds of throat singing: https://www.youtube.com/watch?v=7zZainT9v6Q

And of course the obligatory rap version: https://www.youtube.com/watch?v=el93MIxAf-c