I was skeptical about the claim that listening to sine waves through headphones (or ear buds, and you MUST use one of these. This wont work if you simply play this through speakers) could induce deep relaxation or sleep. Well, I want to tell you that this worked and worked so well that I bought other apps using this technology. You set the timer, aturn the volume to low (just noticeably audible is fine) and listen passively. Dont concentrate: this isnt meditation where you have to focus on anything. Just relax, daydream, and, before you know it, you may find yourself napping or deeply relaxed. I know that I did. How does it work? When two tones of differing but close frequencies play in your ears, the brain tries to combine them by blending. If the resulting blend is similar to a brainwave pattern, the brain will mimic this frequency and gradually settle down into that frequency. Beta waves stimulate. Alpha waves relax. Theta waves lead to meditation and sleep. Delta waves lead to deep sleep. This app carries you through several frequencies until you are relaxed. I find that 15-20 minutes is enough to knock me out. Not everyone is equally sensitive to this phenomenon but I am glad that I am!
benny727 about BrainWave Binaural Power Nap