Hemisphear

Dichotic tone generator — a modern evolution of classic binaural beat tools
🎧 Headphones required. Binaural beats only work when each ear receives a different frequency.
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Signal Visualizer
Left ear (carrier − beat/2) Right ear (carrier + beat/2)
Idle
— beat · — carrier
L: 217.0 Hz · R: 223.0 Hz (Dichotic)
✓ Oster Optimal Zone — strong brainstem phase-locking
6.0 Hz
Theta — Drowsy, meditative, hypnagogic
220 Hz
Lower carriers feel softer; 150–300 Hz works well for most people. Oster curve peaks near 200–440 Hz.
70%
20%
Stochastic masking noise reduces ear fatigue and enhances beat perception.
Off
Gradually eases from your current beat frequency toward the target state, then fades out. 0 = continuous.

Presets