Stream music and podcasts FREE on Amazon Music. No credit card required.Listen free 12345Greater Than 40 Hz Gamma (Insight, Peak Focus)
613 to 39 Hz Beta (Alertness, Concentration, Cognition)
77 to 13 Hz Alpha (Relaxation, Visualization, Creativity)
84 to 7 Hz Theta (Meditation, Intuition, Memory)
9Less Than 4 Hz Delta (Detached Awareness, Healing, Sleeping)
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