12Brain Relaxation while Night (0,5 Hz-1,5 Hz)
34Focus on the Lessons (1 Hz-1,5 Hz)
56Alpha Waves for Preschoolers (10 Hz)
7890,5 Hz-1,5Hz Memorization
1011Delta Waves for Teens (1 Hz-1,5 Hz)
1213Natural Delta Waves (1 Hz-1,5 Hz)
14Soothing Studying (0,5 Hz-1,5 Hz)
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