Music can slow down and equalize brain waves. It has been demonstrated repeatedly: brain waves can be modified by both music and self-generated sounds. Ordinary consciousness consists of beta waves, which vibrate from fourteen to twenty hertz. Beta waves occur when we focus on daily activities in the external world, as well as when we experience strong negative emotions. Heightened awareness and calm are characterized by alpha waves, which cycle from eight to thirteen hertz. Periods of peak creativity, meditation, and sleep are characterized by theta waves, from four to seven hertz, and deep sleep, deep meditation and unconsciousness produce delta waves, ranging to .5 to three hertz. The slower the brain waves, the more relaxed, contented and peaceful we feel.
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