The Lab
Binaural Beat Generator
One tone in each ear, a few hertz apart. Your brain hears the difference as a slow pulse that exists in neither tone. Set the two frequencies yourself or start from a brainwave band, and watch the waves meet.
Headphones needed: each ear hears a different tone.
10.0Hz beat
Alpha band (α) · Silent
Left ear 200.0 hertz, right ear 210.0 hertz, producing a 10.0 hertz beat.
Off. A soft, deep wash, like distant surf, can make long sessions more comfortable.
Listen with headphones at a low, comfortable volume. Don't listen while driving or doing anything that needs your full attention.
What you're hearing
Each ear receives one steady tone. Neither tone pulses. The beat is made inside your head, where the signals from both ears meet in the brainstem, and it beats at the difference between the two: 200.0 Hz and 210.0 Hz make 10.0 beats per second.
The bottom line of the display shows the two waves added together. The dotted outline is the beat: where the waves line up they reinforce each other, and where they drift apart they cancel out.
Go further
Where binaural beats come from, how the brainwave bands are defined, and what research has and hasn't found about their effects.