This alpha brainwave is what is present when we are relaxed and conscious. To induce sleep (a delta brainwave of 5 hertz), a person may need to devote at least 45 minutes, in a relaxed position, ...

CNET's sleep and wellness experts turn to these "comfort" shows for unwinding before bedtime -- and you can, too.

Wondering what kind of sound to play to get the best night's sleep? Here's the difference between white and brown noise.