Sound basics
Binaural beats: what your headphones are doing
Two tones, a perceived beat, and what research can and cannot tell us.
Pure Ascension Sound Editorial · A short listening guide
Two ears, two tones
When slightly different tones are delivered separately to the two ears, a listener may perceive a binaural beat related to the frequency difference. For example, 200 Hz in one ear and 210 Hz in the other can produce a perceived 10 Hz beat. The beat is not the same thing as playing a single 10 Hz audible tone.
Why stereo matters
To preserve separate left and right signals, use stereo headphones for a track explicitly made with binaural beats. Mono playback combines the channels and changes the presentation. Ordinary ambient music does not automatically require headphones. Never assume a track contains binaural beats simply because its title mentions a brainwave band.
What the evidence says
A 2023 systematic review found inconsistent evidence that binaural beats entrain brain oscillations. A perceived beat is not proof that your brain has entered a particular state. Enjoyment or a sense of calm is a personal experience; a promise of guaranteed sleep, intelligence, or a specific EEG pattern goes further than that evidence supports.
Sources & further reading
Listening guidance for relaxation and reflection. These guides do not diagnose or treat health conditions.
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