Binaural Beats Generator - Experimental Audio Tool

How to use this tool

1. Put on headphones - this only works with headphones.
2. Select a preset or manually enter a beat frequency.
3. Click "Play" and keep the volume comfortable.
4. Relax, focus, or meditate while the beats play.
5. Click "Stop" when done.

Important safety information

Binaural beats are experimental audio for entertainment and experimentation, not a medical treatment. Do not use them if you have epilepsy or a seizure history, a heart condition, or a pacemaker, or are pregnant without first consulting a clinician. Do not listen while driving, operating heavy machinery, or doing any task that requires your full attention. Keep the volume comfortable and avoid high listening levels.

The science behind binaural beats

When two tones of slightly different frequency are presented separately to each ear via headphones, the brain perceives a rhythmic "beating" tone at the difference frequency. This phenomenon is called binaural auditory beats. Research into whether this can induce specific brainwave states is ongoing and inconclusive.

Brainwave frequency bands

Binaural beats are designed to create a perceived beat frequency matching one of these bands. For example, playing 200 Hz in the left ear and 208 Hz in the right produces a perceived 8 Hz beat, targeting the alpha band. Whether this causes meaningful brainwave entrainment in most listeners is debated in the scientific literature.

Privacy

All audio is generated locally in your browser using the Web Audio API. No network requests are made.

Headphone requirement

Binaural beats require stereo headphones or earbuds. They do not work on speakers or mono audio devices because the effect depends on delivering slightly different tones to each ear independently. Over-ear or in-ear stereo headphones both work. Bluetooth headphones also work, though very high latency connections may affect the perceived beat frequency slightly.

Recommended session lengths

Research protocols typically use sessions of 20–30 minutes for studying potential cognitive or relaxation effects. Shorter sessions (5–10 minutes) are common for stress-relief applications. There is no established maximum, but listening for hours at high volume could cause hearing fatigue. Keep the volume at a comfortable conversational level.

What to expect in your first session

The perceived "beating" tone is subtle - a gentle rhythmic pulse in the combined sound of both tones. Most listeners can hear it clearly once they know what to listen for. Set realistic expectations: scientific evidence for dramatic cognitive effects is mixed and inconclusive. Many people find them helpful for relaxation and focus as a form of ambient audio, regardless of any brainwave entrainment effects.