Every brainwave frequency from 0.5 Hz to 963 Hz, explained with the science that does — and does not — support it. Start with your goal, not with a number.
Most people arrive here having read a specific number somewhere and wanting to know what it does. That is the harder way round.
A binaural beat is not a sound you hear directly. Play 200 Hz in one ear and 210 Hz in the other and your auditory system perceives a third, phantom pulse at the difference — 10 Hz. That difference is the number that matters, and it is the number every page in this guide refers to. The carrier tones themselves are largely interchangeable.
The difference frequency is chosen to sit in the range your brain already produces during the state you want. That is the whole idea behind entrainment: EEG studies reliably show a frequency-following response, where cortical rhythm shifts toward an external periodic stimulus. What is far less certain — and worth being honest about — is how strongly that shift translates into the subjective outcome you are after. Effects are real but modest, and they vary a lot between people. Treat frequency choice as a starting point to experiment from, not a prescription.
So work backwards from what you want to happen:
| What you want | Band | Where to start |
|---|---|---|
| Fall asleep, stay asleep, recover physically | Delta · 0.5–4 Hz | 2 Hz |
| Meditate, access creative or hypnagogic states | Theta · 4–8 Hz | 6 Hz |
| Calm down, relax without getting drowsy, ease anxiety | Alpha · 8–14 Hz | 10 Hz |
| Concentrate, study, do analytical work | Beta · 14–30 Hz | 16 Hz |
| Peak cognition, memory binding, demanding tasks | Gamma · 30–100 Hz | 40 Hz |
The Solfeggio and 432 Hz frequencies further down are a different category entirely. They are carrier tones drawn from a musical and spiritual tradition rather than difference frequencies drawn from EEG research, and the claims attached to them are cultural, not clinical. They are covered here because people ask about them and deserve a straight answer — each page separates what the tradition says from what has actually been measured.
Stereo headphones are not optional. This is the single most common reason people conclude binaural beats "do not work" for them. The effect exists only because each ear receives a different tone in isolation. Play the same file on a laptop speaker, a phone speaker or a smart speaker and the two tones mix in the air before they reach you — there is no binaural beat left, just a slightly wobbly hum. Any ordinary wired or wireless stereo headphones or earbuds are fine; you do not need expensive ones.
Quieter works better than louder. The beat is a perceptual artefact, not a volume effect. Set it just loud enough to hear comfortably underneath your own thoughts. Turning it up adds nothing and risks your hearing.
Give it 15–30 minutes. Sessions shorter than about ten minutes rarely give the effect time to settle. Sleep programmes are the exception and can run all night. Consistency over two to four weeks tends to matter more than any single session.
Some people should check first. If you have epilepsy or a seizure disorder, are pregnant, wear a pacemaker, or are being treated for a psychiatric condition, talk to your doctor before using rhythmic audio entrainment. Never listen while driving or operating machinery — several of these frequencies are specifically intended to make you drowsy. Binaural beats are a complementary wellness tool, not a treatment for any medical or psychological condition, and nothing here replaces professional care.
Ultra-slow waves for the deepest states of consciousness
0.5-4 Hz - Deep sleep, healing, and physical recovery
4-8 Hz - Meditation, creativity, and the subconscious
8-14 Hz - Relaxation, flow state, and calm focus
14-30 Hz - Active focus, concentration, and mental energy
The transition zone between active and peak states
30-100 Hz - Peak cognition, memory, and consciousness
100+ Hz - Transcendent and advanced meditation states
Ancient healing frequencies with modern applications
Cell regeneration stimulation
Natural pain reduction
Tissue and wound healing support
Liberation from fear and anxiety
Facilitating positive life changes
Sense of love and connection
Enhanced interpersonal connections
Enhanced self-expression
Heightened intuition
Divine connection and unity
Unique therapeutic frequencies
Delta, 0.5–4 Hz, is the range your brain produces during the deepest stage of non-REM sleep, and 2 Hz is the usual starting point. In practice the transition matters more than the destination: many people do better beginning in theta (around 6 Hz) while they are still settling and letting the session step down into delta, rather than dropping straight to 2 Hz while their mind is still busy.
For binaural beats, yes — without stereo separation there is no beat at all, only two tones mixing in the room. If you cannot or prefer not to wear headphones, isochronic tones and monaural beats produce a comparable pulsing stimulus through a speaker; see binaural beats vs isochronic tones for the difference.
Most people report something within the first session — usually a settling or a slight heaviness — but that is as much about sitting still with your eyes closed for twenty minutes as it is about the audio. The more meaningful question is whether two to four weeks of consistent use changes how easily you fall asleep or settle into focus. Track that rather than chasing an immediate sensation.
Partly. The frequency-following response is well documented in EEG research, and a 2019 meta-analysis by Garcia-Argibay and colleagues found a small-to-moderate effect on state anxiety across the studies available. Beyond that the literature thins out quickly: sample sizes are small, protocols vary wildly, and blinding is difficult. Anyone promising you a precise percentage improvement is inventing it. Our science page goes through what the studies actually measured.
Yes. The bands are conventions, not hard boundaries, and the difference between 9 Hz and 10 Hz is not something you will consciously detect. The free generator lets you set any frequency and experiment. Use these pages to find the neighbourhood, then adjust by feel.
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