Sound helps to facilitate shifts in our brainwave state by using entrainment. Entrainment synchronizes our fluctuating brainwaves by providing a stable frequency which the brainwave can attune to. By using rhythm and frequency, we can entrain our brainwaves and it then becomes possible to down-shift our normal beta state (normal waking consciousness) to alpha (relaxed consciousness), and even reach theta (meditative state) and delta (sleep; where internal healing can occur).
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