TL;DR
Binaural beats are real. Your brain genuinely perceives a beat that isn't in either ear's signal. That was first described in 1839 and has been studied ever since.
Whether they change your brain state is a different question, and the evidence is mixed.
The most consistent findings are for anxiety, especially around stressful events like surgery. The weakest are for the "your brainwaves lock onto the beat" story you see in most videos.
Research on focus, memory, pain, and sleep has produced some positive results and some null ones.
The honest answer: they seem to help some people, some of the time, for some things. Here's how to try them for yourself.
Type "binaural beats" into any search bar and the first page splits cleanly in two. Half the results promise they'll rewire your brain in eight minutes. The other half say it's all placebo and you may as well listen to rain.
Neither is right, and the research is more interesting than either camp admits. This post is the version I wish I'd found when I started: what's established, what's suggestive, what's overclaimed, and what you can try on yourself.
First, the part nobody disputes
A binaural beat happens when each ear hears a slightly different tone. Play 200 Hz in your left ear and 206 Hz in your right, and you perceive a slow 6 Hz pulse that doesn't exist in either signal. Your auditory system builds it from the difference, starting in the brainstem.
Heinrich Wilhelm Dove described this in 1839, and Gerald Oster's 1973 Scientific American paper brought it into the modern literature. The perception is real, it's measurable, and it only happens when each ear gets its own tone, which in practice means headphones.
So "binaural beats are fake" is wrong on the facts. The real question is the next one.
The claim that's actually in dispute
The popular story goes: your brain hears a 6 Hz beat, your brainwaves "entrain" to 6 Hz, and you slide into a theta state. Tidy. It's also the weakest link in the chain.
Studies that measure brain activity with EEG while people listen to binaural beats have come back inconsistent. Some find a shift in the target frequency band. Others find nothing. A few find changes, but not in the band the beat was supposed to target. A 2023 systematic review looked at 14 of these studies: five supported entrainment, eight contradicted it, one was mixed. The authors concluded the question is still open. One well-designed 2020 study found that binaural beats did entrain cortical activity, but less than ordinary monaural beats, the kind that work fine on a speaker.
That doesn't mean nothing is happening. It means the "your brainwaves lock on" explanation hasn't held up the way the marketing assumes. If something is working, it may be working through a different door, and nobody has proven which one yet.
What the better studies do show
Set the mechanism aside and ask a simpler question: do people who listen to binaural beats feel or perform differently afterward?
Here the picture improves, with caveats.
Anxiety. This is where the evidence is most consistent, especially around medical procedures. A 2005 randomized trial of 104 patients waiting for surgery compared binaural-beat audio against the same audio without the beat. Anxiety scores dropped 26% in the binaural group versus 11% with the plain audio. One caveat worth knowing: the binaural group started out more anxious, and after adjusting for that the difference between the two audio groups fell just short of statistical significance. A 2019 meta-analysis pooling 22 studies found a significant, medium-sized overall effect across anxiety, cognition, and pain combined. A 2025 meta-analysis of 15 perioperative studies found anxiety reductions too, though the size of the benefit varied a lot from study to study.
Attention and memory. The 2019 meta-analysis included cognitive outcomes in its positive overall result, but individual studies conflict. Some report better performance on attention tasks; others find no difference. Call it suggestive, not settled.
Pain. A 2024 systematic review found 16 studies, most of them on short-term pain around procedures rather than chronic pain, and a 2026 meta-analysis of theta beats reported reduced pain in the four trials it could pool. The authors rated that evidence low-certainty. Promising, but early.
Sleep. The one most people care about. There is direct research here, and it points both ways. A 2019 trial in people with mild insomnia found no significant advantage for binaural-beat music over music alone. A 2024 trial in 64 older adults with poor sleep found better sleep quality in the binaural group. A small 2024 study using sleep monitoring found faster sleep onset, in ten people. Mixed, small, and worth watching.
Why the results are so messy
A few things keep showing up when you read across these studies.
Session length. The 2019 meta-analysis found that longer exposure was associated with bigger effects. But some studies found effects in five or ten minutes, and some long sessions found nothing, so there's no proven minimum.
Expectation. Placebo and expectation effects are real in any relaxation research, and almost none of these studies can fully separate them from the beat itself. For a tool you use to unwind, that's less damning than it sounds. If expecting to relax helps you relax, that's part of how the tool works. But it does mean the "pure" effect of the beat is still unknown.
Design. The 2023 review found wide variation in how studies were run: different frequencies, durations, carrier tones, EEG methods, and comparison conditions. Two studies that both say "binaural beats" can be testing quite different things, which makes it hard to add them up.
The honest summary
Here's where I land after reading more of this than is healthy:
Binaural beats reliably produce a perception. Controlled studies have repeatedly found lower self-reported anxiety after listening, though how much and for whom varies. The findings on focus, memory, pain, and sleep are mixed and mostly small. The "brainwave entrainment" explanation is unproven and may be wrong. Nothing here has been established as a treatment for any condition, and nothing here replaces sleep, medication, or a therapist.
That's a smaller claim than the videos make. It's also a bigger claim than "it's all placebo," and it's enough to be worth trying.
How to try it on yourself
Research tells you about averages. You're not an average. Here's a simple way to see what it does for you. It isn't a scientific trial, just a way to notice more than you would by pressing play.
Pick one goal. Winding down at night, or settling before something stressful. Don't try three things at once.
Use headphones. Earbuds are fine. On a speaker you're not hearing a binaural beat at all.
Give it real time. Twenty minutes is a reasonable session; the studies that used longer sessions tended to find more.
Rate yourself before and after, one to ten, in a note on your phone. Takes ten seconds.
On some nights, swap the beat for plain ambient sound at the same volume, and rate those too.
After a week or two, look at your numbers. A handful of nights won't prove anything, and your mood, your day, and what you expected will all leak into the ratings. But if the beat nights keep coming out better, that's worth something to you, whatever the meta-analyses say.
In Sound Orbit, the four mode cards on the Home screen are built for exactly this. Drift Off runs a delta beat for sleep; Lock In runs beta for focus. Both are free, and the Mixer lets you drop the beat and keep the ambient layer for your comparison nights.
Try it. Then weigh your own experience alongside the research, not instead of it.
Download for iOS · Download for Android
Sound Orbit is a sound-wellness app, not a medical device. Nothing here is medical advice. If you're dealing with persistent anxiety, insomnia, or pain, talk to someone qualified.
Sources referenced
Oster, G. (1973). Auditory beats in the brain. Scientific American, 229(4).
Garcia-Argibay, M., Santed, M. A., & Reales, J. M. (2019). Efficacy of binaural auditory beats in cognition, anxiety, and pain perception: a meta-analysis. Psychological Research, 83.
Padmanabhan, R., Hildreth, A. J., & Laws, D. (2005). A prospective, randomised, controlled study examining binaural beat audio and pre-operative anxiety. Anaesthesia, 60(9).
Orozco Perez, H. D., Dumas, G., & Lehmann, A. (2020). Binaural beats through the auditory pathway: from brainstem to connectivity patterns. eNeuro, 7(2).
Ingendoh, R. M., Posny, E. S., & Heine, A. (2023). Binaural beats to entrain the brain? A systematic review. PLOS ONE, 18(5).
Xiong et al. (2025). Binaural beats for perioperative anxiety and pain: systematic review and meta-analysis. PubMed 41176178.
Shamsi et al. (2024). Binaural beats for acute and chronic pain: systematic review. PubMed 38216943.
Fatima et al. (2026). Theta binaural beat therapy: systematic review and meta-analysis. PubMed 42349368.
Minimal effects of binaural auditory beats for subclinical insomnia (2019). PubMed 31433343.
Lin et al. (2024). Binaural-beat music and sleep quality in older adults. PubMed 38319068.
Dynamic binaural beats and sleep onset (2024). PubMed 38629490.
