Binaural Beats

What it is

Binaural beats are an auditory effect created by the brain. You hear two slightly different pure tones, one in each ear, and your brain perceives a third sound: a gentle pulse. The brain aligns with this pulse, a process called the Frequency Following Response, helping you move into different states of mind.

An example

Your left ear hears 200 Hz. Your right ear hears 210 Hz. You don't hear two separate tones. You hear one tone that gently pulses 10 times per second. This pulse is created inside your brain.

Where it happens

Deep in the brainstem, a small group of cells called the superior olivary complex compares the sound from both ears. This is the same place that helps you tell where a sound comes from. When the two tones are slightly different, it detects the gap, and you perceive it as a beat.

The Frequency Following Response

The brain's electrical activity aligns with a rhythm it hears. This is called the Frequency Following Response. A 10 Hz beat encourages the brain to move toward the Alpha state, linked to calm and relaxed focus.

A short history

The German physicist Heinrich Wilhelm Dove first described the effect in 1839. In 1973, the biophysicist Gerald Oster published “Auditory Beats in the Brain” in Scientific American, and modern research began.

What makes it work

• Headphones, so each ear hears its own tone.
• Tones below about 1000 Hz.
• A difference under 30 Hz, matching the brainwave bands:
  • Delta (0.5–4 Hz): deep sleep
  • Theta (4–8 Hz): meditation, dreaming
  • Alpha (8–13 Hz): calm, relaxed focus
  • Beta (13–30 Hz): alertness, active thinking
  • Gamma (30+ Hz): high-level processing

What research shows

A 2019 review found moderate effects on attention, memory, anxiety and pain perception. The brain responds best when the frequency, the volume and the session length are well matched to the person.

How to listen

• Use headphones.
• Keep the volume low.
• Sit or lie down in a quiet place.
• Listen for 10 to 15 minutes or more.
• Notice how you feel before and after.

How Inner Dive uses it

In Your Journey and the Generator, you can choose a binaural beat for each brainwave band, alone or layered with pure tones and landscapes.

Safety

Listen when you can fully relax, not while driving. If you have a history of seizures or epilepsy, ask a health professional first.