Today in Trig, my professor showed us this page http://en.wikipedia.org/wiki/Beat_%28acoustics%29
it's all about mathematics and sound waves and they even talks about binaural beats it was crazy!! Anyone interested in extra research on how these doses work should check this out!!
.....I'm still below that level haha I had just never realized that the stuff I was learning pertains to sound waves...well of course it's obvious but it still blew me away