Why do I need headphones?

Binaural beats require each ear to receive a different frequency. This only works with stereo headphones or earphones that separate the left and right channels. Speakers mix the audio before it reaches your ears, so the effect is lost.

Is there scientific evidence that binaural beats work?

Research is mixed. Some studies suggest binaural beats can promote relaxation or improve focus, but the effect size is generally small. They are widely used in meditation and sleep apps and are safe for most people. They are not a medical treatment.

What carrier frequency should I use?

The carrier frequency (100–400 Hz) affects the tone you hear but not the beat frequency. Lower carriers (100–200 Hz) produce a deeper, more relaxing tone; higher carriers (300–400 Hz) are brighter. Most presets use 200 Hz as a neutral default.

Are binaural beats safe?

They are generally considered safe for healthy adults at moderate volumes. Avoid them if you have epilepsy or are sensitive to audio stimulation, and never listen at high volumes. Always start at a low volume setting.

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Binaural Beats Generator

Generate binaural beats using the Web Audio API with brainwave presets, carrier frequency controls, and an oscilloscope visualizer.

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About this tool

Create binaural beats directly in your browser using the Web Audio API. A slightly different frequency is played into each ear; the brain perceives the difference as a rhythmic beat that can encourage relaxation, focus, or sleep. Choose from Delta (deep sleep), Theta (meditation), Alpha (relaxed focus), Beta (active thinking), or Gamma (high-level cognition) presets, or dial in your own carrier and beat frequencies. An animated oscilloscope canvas visualises the waveform, and audio fades in and out smoothly on play/pause.

How to use

1 Put on stereo headphones — binaural beats do not work on speakers.
2 Select a preset (e.g. Alpha for relaxed focus) or manually set the carrier and beat frequencies.
3 Adjust the volume slider to a comfortable level, then click 'Play'.
4 Watch the oscilloscope visualizer and allow 5–10 minutes for the entrainment effect to develop.

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