Deep Sleep
How to Use
Lie down in bed with headphones on. Set the lights low or off. Start the session and close your eyes. The frequency descent mirrors natural sleep onset — there is no return phase, so the session will fade to silence while you sleep.
How It Works
Binaural beats don't knock you out — they create the brainwave environment your brain naturally enters during deep sleep. When you hear slightly different frequencies in each ear, your brain produces a third "phantom" tone at the difference frequency. This session gradually lowers that difference from alpha (relaxed wakefulness) through theta (drowsiness) into delta (deep sleep). Your brain tends to synchronise with these frequencies through a process called entrainment, easing the transition through each sleep stage rather than forcing it. The absence of a return phase means the tones fade to silence while your brain continues into natural sleep.
Frequency Guide
This session descends from relaxed alpha (10 Hz) through theta (4 Hz) and into deep delta (1.5 Hz). Delta waves are the dominant brainwave during stages 3-4 of sleep, associated with physical restoration and growth hormone release.
Science & Research
Delta brainwave activity (0.5-4 Hz) is the hallmark of deep non-REM sleep. Studies show delta binaural beats can increase time spent in slow-wave sleep. A 2018 study in Frontiers in Human Neuroscience found 3 Hz binaural beats enhanced delta power during sleep.