What Is 7 Hz frequency good for? A careful, evidence-based guide (with references) Short answer: 7 Hz frequency sits inside the theta brainwave band (≈4–8 Hz) and near the Earth-ionosphere Schumann resonance (≈7.8 Hz). People often use 7 Hz frequency audio (binaural/monaural beats) or devices claiming to reproduce Schumann frequencies to promote relaxation, meditation, sleep,…
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