Interactive Binaural Beats & Isochronic Frequency Calculator
Adjust the beat frequency (0.5–100 Hz) and carrier pitch (60–600 Hz) in real time. Use stereo headphones for binaural phase offset or switch to Isochronic for speakers.
Delivery Method
Quick Brainwave Band Presets
How binaural beats work
A binaural beat is an auditory illusion. Each ear receives a pure tone at a slightly different frequency, for example 200 Hz in the left ear and 210 Hz in the right. Neither tone contains a beat, but your brainstem combines the two signals and you perceive a soft pulsing at the difference: 10 Hz.
The effect was first described by the physicist Heinrich Wilhelm Dove in 1839 and popularised by Gerald Oster's 1973 article "Auditory Beats in the Brain" in Scientific American. Because the beat is created inside your head rather than in the air, you need headphones; on speakers both tones reach both ears and the illusion disappears.
Choosing a beat frequency
| Band | Beat | Commonly chosen for |
|---|---|---|
| Delta | 0.5 – 4 Hz | Winding down, sleep |
| Theta | 4 – 8 Hz | Meditation, drowsy creativity |
| Alpha | 8 – 13 Hz | Calm, relaxed focus, reading |
| Beta | 13 – 30 Hz | Alertness, active problem solving |
| Gamma | 30 – 100 Hz | Intense concentration (40 Hz is the classic) |
The carrier tone is the pitch you actually hear. Binaural beats are perceived most clearly with carriers below about 1,000 Hz; this generator offers 60 to 600 Hz. Lower carriers feel warm and humming, higher ones clearer and more present. Beats above roughly 30 Hz are harder to hear as a binaural pulse, so for gamma frequencies many people prefer isochronic tones, which you can switch to with one tap.
What does the research say?
Honest answer: the evidence is mixed. A 2019 meta-analysis by Garcia-Argibay and colleagues in Psychological Research pooled 22 studies and found a small to moderate effect of binaural beats on memory, attention, anxiety and pain perception, with large differences between studies. A 2023 systematic review in PLOS ONE looked specifically at whether binaural beats make brain waves "follow" the beat and found inconsistent results.
In other words, binaural beats are not a switch that puts your brain into a chosen state. Many people still find a steady, gentle pulse helps them settle, block out distractions or create a ritual for starting work or winding down. They are low-risk at sensible volumes, so the best test is to try different bands and notice what helps you.
How to use this online binaural beats generator & maker
- Put on headphones and set the volume low.
- Pick a band in the Brainwaves panel or type an exact frequency.
- Add a noise layer from Sounds, such as quiet brown noise or rain, to make long sessions more comfortable.
- Try a Session if you want the beat to glide between bands automatically, for example from beta down to alpha.
Avoid pulsing audio such as binaural beats and isochronic tones if you have epilepsy or a seizure disorder, and do not listen while driving.
Frequently asked questions
Do binaural beats really work?
Research shows small, inconsistent effects on attention, memory and anxiety, and no reliable proof that they force brain waves into a chosen state. Many people still find them helpful as a focus or relaxation aid.
Do I need headphones for binaural beats?
Yes. Each ear must hear a different tone. On speakers, use isochronic tones instead.
How do I make custom binaural beats online for free?
Open the Brainwaves panel in this free online binaural beats maker, set your carrier pitch (60–600 Hz) and choose your exact beat frequency from 0.5 Hz (delta) to 100 Hz (gamma).
How long should I listen?
Most studies used sessions of 10 to 30 minutes. Start there, keep the volume low and see how you feel.
Are binaural beats safe?
For most people, at a comfortable volume, yes. People with epilepsy or seizure disorders should ask a doctor first, and you should not listen while driving or operating machinery.
What carrier frequency should I use?
Anything from about 150 to 400 Hz works well. Choose the pitch you find most pleasant; the beat frequency matters more than the carrier.