Do Binaural Beats Work? What the Research Shows

What binaural beats are

Play a 400 Hz tone in your left ear and a 410 Hz tone in your right, and you will hear something that is in neither ear: a single tone that seems to pulse or waver ten times a second. That is a binaural beat. The perceived beat equals the difference between the two tones, and it can be heard for differences of about 1 to 30 Hz ^[5].

The beat is an illusion created by the brain. The two sound waves never meet; the beat arises where signals from the two ears are first combined, in a part of the brainstem called the superior olivary complex, which normally helps you work out where a sound is coming from ^[5][4]. That is why binaural beats need headphones, so that each tone reaches only one ear ^[5]. The tones also have to be fairly low: the effect needs tones of no more than about 1,000 Hz and is heard best at about 400 Hz ^[5].

Binaural beats were first described in 1839. They were treated as a curiosity for more than a century, until a 1973 article by Gerald Oster revived interest, both among scientists and, as a recent review puts it, in "certain pseudoscientific contexts" ^[5].

The claims

The popular claim rests on one idea, brainwave entrainment: if you listen to a beat at a given frequency, your brain's electrical rhythms will start to oscillate at that frequency too ^[5]. Because different EEG frequency bands are associated with different mental states, the assumption is that the right beat can put you into the matching state ^[5]. Claims that binaural beats can steer brain activity and mood appear both in scientific papers and in marketing ^[8]. Researchers have tested binaural beats on attention and memory, mood and anxiety, pain, relaxation, mind-wandering and creativity ^[5].

The claims therefore come in two parts: that binaural beats change brain activity, and that they improve how you think or feel. The research on each is covered below.

What the meta-analyses found

Cognition, anxiety and pain. A 2019 meta-analysis pooled 22 studies, with 35 effect sizes, on memory, attention, anxiety and pain ^[1]. The overall effect was medium (g = 0.45). The authors reported that exposure before a task, or before and during it, worked better than exposure only during it, that longer exposure went with larger effects, and that the direction and size of the effect depended on the beat frequency used ^[1].

Memory and attention. A 2023 meta-analysis of 15 studies, with 31 effect sizes, found a medium average effect (g = 0.40) ^[2]. Its systematic review of the same studies found conflicting results, especially for theta and beta beats on memory and attention tasks, and the authors called for more research with robust study designs ^[2].

These averages pool studies with different beat frequencies, tasks and comparison sounds, and in the 2019 analysis the direction of the effect depended on the frequency ^[1]. A medium average across such studies is a reason to test further, not evidence that a particular track will help you.

Attention: what the careful experiments found

Two recent studies tested the attention claim directly, with several experiments or conditions each.

Three experiments, mostly null. Robison and colleagues played beta-frequency (16 Hz) binaural beats during a sustained-attention task ^[3]. In the first experiment, responses were faster with the beats, but the effect was modest and the statistical evidence was inconclusive. A second experiment found a different effect, a smaller decline in performance over time, and no change in self-reported task focus. Combining the two experiments gave rather strong evidence against the idea that beta beats improve sustained attention, and a third experiment found no effect on pupil measures of arousal or engagement ^[3].

Sixteen combinations. In a preregistered study, 80 undergraduates were randomly assigned to one of 16 combinations of beat settings (beat frequency, carrier tone, timing and background noise), and each did a sustained-attention task twice, once with binaural beats and once with a plain control tone ^[4]. The beats did little for the decline in attention over the session. Gamma beats with a low carrier tone, and beats played with white noise, improved overall performance ^[4]. The authors note that with only about eight participants in the smallest groups, the study was too small to test the more complex combinations of settings ^[4].

Anxiety and sleep

Anxiety around surgery. The strongest-looking results come from patients around the time of an operation. A 2025 meta-analysis of 15 randomised trials found that, compared with blank audio, binaural beats reduced anxiety around the time of surgery (14 trials, 1,047 patients; standardised mean difference −1.38, 95% CI −1.89 to −0.87) ^[6]. Against audio without binaural beats, the advantage was smaller and far less certain (8 trials, 598 patients; −1.01, 95% CI −1.99 to −0.03) ^[6]. The results varied enormously between trials (I² of 91.6% and 95.4%), and the authors noted the substantial heterogeneity and the need for further high-quality trials ^[6]. These are patients around the time of an operation, not people using a track to calm down at work. For what stress does to attention and memory, and what helps in the moment, see How does stress affect attention and memory?.

Sleep. In one laboratory study, 12 healthy young adults took four 90-minute afternoon naps: one in silence, and three with binaural beats of 0, 0.25 or 1 Hz on a 250 Hz tone ^[9]. With 0.25 Hz beats, people reached deeper stages of sleep sooner than in silence ^[9]. But the 0.25 Hz beats did not differ significantly from the same tone without a beat, the analysis was not corrected for multiple comparisons, and there was no sign that brain rhythms followed the slow beats ^[9]. At home, a study of 221 people used a smartphone app that played a monotonous sound with binaural beats, with monaural beats or with no beats, each on a different attempt to fall asleep. The time it took to fall asleep did not differ between the three sounds ^[7]. That study's full report is in Russian; we read its English abstract. For what is known about sleep and learning, see Sleep and memory.

Does the brain follow the beat?

This is the question the whole idea depends on. A 2023 systematic review of EEG studies in healthy adults with normal hearing found 14 that met its criteria ^[5]. Five reported results in line with brainwave entrainment, eight reported results that contradict it, and one was mixed ^[5]. The studies were small, mostly of young adults, and so different in their methods that they were hard to compare; every study that embedded the beats in pink noise found no entrainment ^[5]. The reviewers concluded that the question cannot be settled yet, and that studies reporting psychological effects of binaural beats without measuring any change in brain activity should be treated with caution ^[5].

Single studies point both ways:

• In 14 university students, beats at five frequencies from theta to high gamma did not change EEG power in the matching frequency bands, or heart rate and skin conductance ^[10]. The authors note that 14 participants may have been too few to detect a real effect ^[10].
• In 16 adults, both binaural beats and monaural beats, where the beat is physically present in the sound ^[5], produced a response in the cortex at the beat frequency, but binaural beats did so only weakly compared with monaural beats, and neither changed mood ^[8].
• In the 16-combination study, EEG power at the beat frequency was higher with binaural beats than with the plain tone, more so for gamma than beta beats, while white noise weakened this response even though it went with better task performance ^[4].

So the auditory system can produce a measurable response at the beat frequency. That is a long way from putting the whole brain into a "focused" or "sleepy" state, and where studies measured both, brain responses and effects on behaviour or mood did not line up ^[4][9][8].

Why the results conflict

The control sound. The comparison sound decides what a study can show. Studies of binaural beats have used pure tones, tones without a beat, monaural beats or silence as controls ^[5]. Beating silence shows only that some sound did something. In the nap study, the beats differed from silence but not from the same tone without a beat ^[9], and in surgery, the advantage over blank audio was larger and more certain than the advantage over other audio ^[6].

Blinding. Listeners can usually hear whether a track contains a sound, so a comparison with silence cannot be blind. Hiding the beat itself is easier: of 29 people screened for one study, 9 could not tell 0.25 Hz beats from a steady tone, and 5 could not tell either 0.25 Hz or 1 Hz beats from it ^[9]. The same sound without a beat is the fairer comparison, and in both sleep studies above, binaural beats did no better than it ^[9][7].

Too many settings. Beat frequency, carrier tone, background noise, timing and length of listening all vary between studies ^[5], and in the meta-analysis the effect changed with several of them ^[1]. When one combination out of many works in a small group, it needs to be repeated before anyone can rely on it.

Small studies and publication bias. Low statistical power has a less obvious cost: when a small study does find a significant result, it is less likely to reflect a true effect, and the effect it reports tends to be too large ^[11]. Much of the binaural beat research is small ^[5][10][8]. A pooled average can also be inflated if studies that found nothing were never published, and the summaries of the two cognition meta-analyses do not say whether their averages were corrected for this ^[1][2].

Safety basics

Binaural beats are sound, so the main risk is to your hearing. A 2022 meta-analysis of 33 studies with 19,046 people aged 12 to 34 estimated that 23.81% listen to personal audio devices at unsafe levels, and that between 0.67 and 1.35 billion young people worldwide could be at risk of hearing loss from unsafe listening ^[12].

• Keep the volume low and comfortable, and take breaks from headphones.
• Do not listen while driving, cycling or anywhere you need to hear what is around you.
• Stop if the sound makes you uncomfortable, dizzy or anxious, or if your ears ring afterwards.
• Do not use binaural beats in place of care for anxiety or sleep problems. If worry, low mood or poor sleep lasts for weeks or affects your daily life, talk to a doctor or another qualified professional.

What the research says

What this means at LaserMind

We grade binaural beats E3 (limited evidence): the research is mixed, and LaserMind makes no claims about their effects. A meta-analysis reported a medium average effect on memory and attention tasks, but individual studies conflicted ^[2], and the brainwave idea behind the claims is poorly supported ^[5]. How we review evidence explains the grades. If you enjoy binaural beats as background sound, that is fine; just do not expect a proven effect.

LaserMind does not play binaural beats. Two tools cover the same everyday goals without claims about your brainwaves:

• The Deep Work Timer asks you to name one real task, choose 25, 50 or 90 minutes, and tap "I got distracted" whenever you notice your mind has wandered. You can add optional background sound, soft noise or white noise, made in your browser and the same in both ears. We offer it as a sound mask that some people like, with no claims about effects on the brain. Background sound can also distract; Why can't I focus? covers what the research says about noise.
• The Breath Counter has a "Breathing circle 4s/6s" option: a circle grows as you breathe in for about 4 seconds and shrinks as you breathe out for about 6. We grade slow breathing E2 (conditional evidence) for short-term stress regulation. Never hold your breath, and stop if you feel dizzy.

Frequently asked questions

Do I need headphones? Yes. A binaural beat appears only when each tone reaches one ear alone, which is why studies deliver them through headphones ^[5]. Through speakers, the two tones mix in the air and reach both ears, which produces an ordinary acoustic beat instead ^[10].

Which frequency is best for studying? None has been shown to be. The effect in one meta-analysis depended on the beat frequency ^[1], results for theta and beta beats on memory and attention conflict ^[2], and beta beats did not improve sustained attention in a set of careful experiments ^[3].

Can binaural beats help with anxiety or sleep problems? The best results come from patients around the time of surgery, and they shrink against other audio ^[6]; at home, beats did not help people fall asleep faster than the same sound without beats ^[7]. This article is science education, not medical advice. If anxiety or poor sleep is affecting your life, talk to a doctor or another qualified professional.

References

1. 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(2), 357–372. https://doi.org/10.1007/s00426-018-1066-8
2. Basu, S., & Banerjee, B. (2023). Potential of binaural beats intervention for improving memory and attention: Insights from meta-analysis and systematic review. Psychological Research, 87(4), 951–963. https://doi.org/10.1007/s00426-022-01706-7
3. Robison, M. K., Obulasetty, M., Blais, C., Wingert, K. M., & Brewer, G. A. (2022). The effect of binaural beat stimulation on sustained attention. Psychological Research, 86(3), 808–822. https://doi.org/10.1007/s00426-021-01524-3
4. Melnichuk, A., Cooper, R. K., & Hawk, L. W. (2025). A parametric investigation of binaural beats for brain entrainment and enhancing sustained attention. Scientific Reports, 15(1), 4308. https://doi.org/10.1038/s41598-025-88517-z
5. Ingendoh, R. M., Posny, E. S., & Heine, A. (2023). Binaural beats to entrain the brain? A systematic review of the effects of binaural beat stimulation on brain oscillatory activity, and the implications for psychological research and intervention. PLOS ONE, 18(5), e0286023. https://doi.org/10.1371/journal.pone.0286023
6. Xiong, J., Jiang, X., Cai, B., Zhao, L., Zhang, Q., & Luo, J. (2025). Binaural beats for perioperative anxiety and pain: A systematic review and meta-analysis. Complementary Therapies in Medicine, 95, 103299. https://doi.org/10.1016/j.ctim.2025.103299
7. Shumov, D. E., Sveshnikov, D. S., Bakaeva, Z. V., & Dorokhov, V. B. (2023). Monotonous sound stimuli embedded with either binaural or monaural beats have the same effect on sleep latency: study on a large subject group. S.S. Korsakov Journal of Neurology and Psychiatry, 123(4), 109. https://doi.org/10.17116/jnevro2023123041109
8. Orozco Perez, H. D., Dumas, G., & Lehmann, A. (2020). Binaural Beats through the Auditory Pathway: From Brainstem to Connectivity Patterns. eneuro, 7(2), ENEURO.0232–19.2020. https://doi.org/10.1523/ENEURO.0232-19.2020
9. Fan, Z., Zhu, Y., Suzuki, C., Suzuki, Y., Watanabe, Y., Watanabe, T., & Abe, T. (2024). Binaural beats at 0.25 Hz shorten the latency to slow-wave sleep during daytime naps. Scientific Reports, 14(1), 26062. https://doi.org/10.1038/s41598-024-76059-9
10. López-Caballero, F., & Escera, C. (2017). Binaural Beat: A Failure to Enhance EEG Power and Emotional Arousal. Frontiers in Human Neuroscience, 11, 557. https://doi.org/10.3389/fnhum.2017.00557
11. Button, K. S., Ioannidis, J. P. A., Mokrysz, C., Nosek, B. A., Flint, J., Robinson, E. S. J., & Munafò, M. R. (2013). Power failure: why small sample size undermines the reliability of neuroscience. Nature Reviews Neuroscience, 14(5), 365–376. https://doi.org/10.1038/nrn3475
12. Dillard, L. K., Arunda, M. O., Lopez-Perez, L., Martinez, R. X., Jiménez, L., & Chadha, S. (2022). Prevalence and global estimates of unsafe listening practices in adolescents and young adults: a systematic review and meta-analysis. BMJ Global Health, 7(11), e010501. https://doi.org/10.1136/bmjgh-2022-010501