User blog comment:Vel!/What have you been listening to?/@comment-5982810-20141130073232/@comment-2033667-20141130184249

There's some truth and there's some crankery to binaural beats. They are the outcome of an interesting neurological phenomenon, and yes, listening to them can affect your brainwaves, just as listening to any music will affect your brainwaves. The sketchier parts are the use of numerology and the claims that certain difference tones can remedy medical problems, such as in this page. There's no harm in listening to them, of course, as long as the volume levels and listening times don't damage your ears.