Binaural beats are an auditory phenomenon where two slightly different frequencies played in each ear create a perceived "beat" in the brain. This beat frequency is thought to guide brainwave activity toward different mental states — from deep sleep to sharp focus.
Headphones required. Binaural beats only work with stereo headphones or earbuds — each ear must hear a different frequency.
Brainwave Presets
Carrier frequency — stays in comfortable range
Difference between left and right ear frequencies
How to Use the Binaural Beats Generator
This free binaural beats generator creates two separate audio tones — one for each ear — using the Web Audio API. Your brain perceives the frequency difference as a rhythmic pulse, called a binaural beat. By choosing different beat frequencies, you can encourage specific brainwave states associated with sleep, meditation, or concentration.
Choosing the Right Preset
Delta (1–4 Hz): The slowest brainwave state, occurring during deep, dreamless sleep. Use delta binaural beats when winding down before bed or during naps. The 2 Hz default is a classic deep-sleep frequency.
Theta (4–8 Hz): Associated with deep meditation, light sleep, and the hypnagogic state between waking and sleeping. Theta at 6 Hz is often used for mindfulness meditation and creative visualization.
Alpha (8–13 Hz): The relaxed-but-alert state. Ideal for calm focus, light studying, or gentle creative work. Alpha at 10 Hz is one of the most studied frequencies for relaxation without drowsiness.
Beta (13–30 Hz): Active, analytical thinking. Use beta binaural beats when you need to concentrate, study difficult material, or stay alert during repetitive tasks. The 20 Hz preset is a solid focus frequency.
Gamma (30–40 Hz): Associated with high-level cognition, memory formation, and peak awareness. Less commonly used but some users report heightened alertness and clarity at 35–40 Hz.
Best Practices
Wear stereo headphones — this is essential. Use a comfortable but not loud volume (around 40–60%). Give yourself at least 10–15 minutes for the brainwave entrainment effect to develop. Do not use binaural beats while driving or operating machinery. If you have epilepsy or a seizure disorder, consult a doctor first.
Customizing Frequencies
The base frequency (carrier) stays in a comfortable range (100–500 Hz) — it's just a tone your ears won't find fatiguing. The beat frequency is the difference between the two ears and determines which brainwave state you target. For example, a base of 200 Hz and a beat of 10 Hz means the left ear hears 200 Hz and the right ear hears 210 Hz — your brain processes the 10 Hz difference as an alpha-wave beat.
FAQ
Do binaural beats really work?
Research shows binaural beats can influence brainwave activity, which may support relaxation, focus, or sleep onset. Studies are preliminary, and individual responses vary. They work best as part of a relaxation or focus routine — not as a standalone cure for any condition.
Do I need headphones for binaural beats?
Yes — stereo headphones are required. Binaural beats work by playing a slightly different frequency in each ear. Your brain perceives the difference as a third 'beat' frequency. Without headphones, both ears hear both frequencies and the effect is lost. Earbuds also work as long as they play separate left/right audio.
What are the different brainwave states?
Delta (0.5–4 Hz) is associated with deep sleep and healing. Theta (4–8 Hz) is linked to deep meditation, creativity, and REM sleep. Alpha (8–13 Hz) is a relaxed, calm, and alert state — ideal for light relaxation or creative work. Beta (13–30 Hz) supports active concentration and analytical thinking. Gamma (30–40 Hz) is associated with high-level cognition and peak awareness.
Is this tool free?
Yes, completely free. No account or download required. All audio is generated in your browser using the Web Audio API.
Is my data private?
Yes. No audio data is sent anywhere. Everything runs locally in your browser.
Are binaural beats safe?
They are generally considered safe for healthy adults. People with epilepsy, seizure disorders, or pacemakers should consult their doctor before use. Do not use while driving or operating machinery. Keep volume at a moderate, comfortable level.