Binaural beats are also kinda amazing - listen to a 400hz tone with left ear, a 407hz tone with the right ear, and your brain registeres a 7hz beat. Here's an

Binaural beats are also kinda amazing - listen to a 400hz tone with left ear, a 407hz tone with the right ear, and your brain registeres a 7hz beat. Here's an example: http://www.plyply.com/binaural/ http://www.plyply.com/binaural/