Binaural Beats Generator

How binaural beats work

A binaural beat is not a file of ocean sounds with a hidden pulse. It is two pure tones. The left ear gets one frequency, the right ear gets another, and the difference is the beat. If the left tone is 200 Hz and the right tone is 209.3 Hz, the beat is 9.3 Hz. You hear that difference as a slow flutter inside the head. Speakers usually fail, because each ear hears both tones and the split is gone.

Heinrich Wilhelm Dove described the effect in 1839. Gerald Oster put the practical limits in Scientific American in 1973. The flutter is clearest when the tones sit near 440 Hz, still useful from roughly 300 to 600 Hz, and gone as the tones approach 1000 Hz. At a very low carrier, near 90 Hz, listeners start to confuse the beat with the tone itself. Beat rates above about 30 Hz stop sounding like a flutter and start sounding like two tones. That is why a 40 Hz preset can feel less "rhythmic" even though EEG labs still use it.

The first place the two ears meet is the superior olivary complex in the brainstem. From there the auditory pathway can follow the beat. A 2020 study that tracked binaural and monaural beats from the brainstem into cortex found a following response at the beat rate for both, and a stronger cortical response for monaural beats. Monaural beats are the same two tones summed before they reach the ears, so speakers can play them. The toggle on this page switches that routing. It does not change the beat rate.

Entrainment is the claim that the brain's own electrical rhythm locks to the beat. That claim is only partly supported. Ingendoh, Posny, and Heine reviewed 14 EEG and MEG studies in 2023. Six of them found a power increase in the stimulated band: theta, alpha, or gamma. Beta studies mostly did not. So a preset can be honest about the sound it makes and still be modest about what the cortex will do.

This page keeps the lower tone on the left. Swapping ears does not change the beat rate. A few papers put the higher tone on the left. The preset notes say so when that happened.

Presets and the papers behind them

Each card is a protocol, a simplified protocol, or a clearly labeled composition of two protocols. The commercial 432 Hz lists, solfeggio tones, and Schumann-resonance claims are not here, because those are not the frequencies these trials used. You can see the frequency the whole time, so a session on this page is not blinded. Expectation can change how it feels. Several of the better studies hid the beat from the listener.

Calm

Acute calm follows Isik and colleagues, 2017. People waiting for dental surgery heard 200 Hz in one ear and 209.3 Hz in the other, a 9.3 Hz alpha beat, for 10 minutes. Anxiety scores fell more than in the control groups of that trial. A later review of anxiety and depression trials describes the same carrier pair. This preset is those two tones, unmasked, for 10 minutes.

Daily 10 Hz follows the shape of a 21-day randomized trial in healthy adults: 20 minutes a day, a short beta opening, a long alpha middle around 10 Hz, and a short beta close. The published soundtrack swept inside the bands (about 13 to 38 Hz, then 8 to 12 Hz, then back). This preset holds the center of each stage, 18 Hz then 10 Hz then 18 Hz, at a 220 Hz carrier, with a little white noise, because that trial played the beat with white noise. It is a simplification of the sweep, not a copy of the audio file. Menziletoglu and colleagues have also used a 10 Hz beat from 210 Hz and 220 Hz.

Wind-down follows the shape Padmanabhan, Hildreth, and Laws described in Anaesthesia in 2005, not their commercial disc. They used a 30-minute Holosync track whose binaural beat slowed and finished with 10 minutes of delta. Patients who heard the beat had a larger drop in state anxiety than patients who heard the same soundtrack without the beat (about 26% versus 11% on the state anxiety inventory). The disc's exact tones were not published. This preset is a transparent substitute: a 250 Hz carrier that glides from 16 Hz down to 2 Hz and holds 2 Hz for the last 10 minutes. It is not Holosync.

Surgery calm is a 10-minute 10 Hz beat from 98 Hz and 108 Hz, used before elective surgery under general anesthesia. The carrier is low. Oster's listeners had trouble separating a beat from the tone near 90 Hz, so the flutter here is softer than the 200 Hz dental pair. The trial still used this pair, so the card keeps it.

Meditation

Meditation, 30 min is the 2017 laboratory session from Jirakittayakorn and Wongsawat: 250 Hz in one ear and 256 Hz in the other, 6 Hz, 30 minutes, about 65 dB. Theta power rose across the cortex within about 10 minutes, with a frontal and parietal pattern they compared to meditation, and tension on the Brunel mood scale fell relative to control. The same two tones appear on the 15-minute insomnia card. The duration and the outcome are different. Do not stack them.

Five-minute calm, Calm 9 Hz, and Calm 12 Hz come from a self-administered headphone study. A 250 Hz tone and a second tone 3, 6, 9, or 12 Hz away were played for five minutes. Only 6 Hz raised both calm and focus. 9 Hz and 12 Hz raised calm alone. 3 Hz did not, so there is no 3 Hz card. A second experiment found 6 Hz inside pink noise preferable to the bare beat, and both preferable to pink noise or silence. The 6 Hz card includes that pink bed. The paper put 250 Hz on the left. This generator puts the lower tone on the left. The beat rate is unchanged.

Theta 7 Hz is Wahbeh, Calabrese, and Zwickey, 2007: 133 Hz and 140 Hz for 30 minutes under rain-like pink noise. They did not find scalp EEG entrainment at 7 Hz. Treat it as a specified listening protocol with a negative entrainment result, not as a proven meditation switch. Lavallee and colleagues, 2011, also used 7 Hz for 15 minutes during meditation and 15 Hz as a contrast that pushed novices toward gamma. They did not publish the carrier, so 15 Hz meditation is not a card.

Sleep

Theta 6 Hz follows Bavafa, Foroughi, Jaberghaderi, and Khazaei, 2023. Adults with primary insomnia heard 250 Hz and 256 Hz, a 6 Hz beat, for 15 minutes with eyes closed, in the late morning. Theta power on the EEG rose after the beat and did not rise after white noise. That is an EEG result from a daytime session. It is not an overnight sleep trial, and it does not by itself say that 15 minutes at bedtime will fix insomnia.

Sleep onset is composed, and the card says so. The first 15 minutes are the 6 Hz pair above. The next 15 minutes glide the beat from 6 Hz to 2 Hz and raise pink noise, so the session lands in delta instead of stopping in the middle of theta. No single paper tested this join.

Dynamic delta follows the idea in Lee and colleagues, Sleep, 2024: a beat that moves inside the delta and low-theta range on a one-minute cycle, played quietly before sleep. Their carrier was 100 Hz. Oster's listeners had trouble separating beat from tone near 90 Hz, so this preset uses 140 Hz and moves the beat between 2 Hz and 4 Hz. Their study was a proof of concept on sleep latency and heart-rate variability, not a large trial. The level they used was about 50 dB, a soft speaking voice. This page cannot set decibels at your eardrum. Stay in that neighborhood.

Slow-wave nap follows a 2024 daytime-nap experiment: 250 Hz and 250.25 Hz, a 0.25 Hz beat, played for the whole 90-minute nap at about 60 dB. N2 and N3 arrived sooner than in the sham nap. The same study also played 1 Hz and a pure 250 Hz tone. The latency result that held was 0.25 Hz, so that is the only card from the set. Twelve people. You will not hear a fast flutter. The loudness swells about once every four seconds. Do not use it when you need to wake up soon.

A 2025 meta-analysis in Gazzetta Medica Italiana pooled three randomized insomnia trials, 97 people. Binaural beats reduced insomnia severity with a standardized mean difference of about -0.45, and a smaller pair of studies showed a similar shift in quality of life. Heterogeneity was zero, and the authors called the certainty moderate. Three small trials are a reason to try a wind-down, not a reason to throw out sleep treatment.

Focus and memory

Before work uses a 16 Hz beta beat for 15 minutes, then stops, so you start the task after the sound. The frequency comes from Lane, Kasian, Owens, and Marsh, 1998. During a 30-minute visual vigilance task, beta beats at 16 Hz and 24 Hz, hidden in pink noise, produced more hits and fewer false alarms than theta and delta beats at 1.5 Hz and 4 Hz, and less negative mood. Lane did not publish the carrier. This preset uses 340 Hz, inside the 300 to 600 Hz window where beats are easiest to hear. The timing is not Lane's. Garcia-Argibay, Santed, and Reales, 2019, found that listening before a task, or before and during it, beat listening only during the task. This card takes Lane's frequency and the meta-analysis's timing. A light pink bed is there because Lane used pink noise.

Vigilance is closer to the session itself: 30 minutes, carrier 340 Hz, the beat moving between 16 Hz and 24 Hz every minute with a 2 second glide, light pink noise. Lane presented both beta rates. He did not say he alternated them every minute. The alternation is a way to include both published rates in one sitting.

Working memory follows Beauchene, Abaid, Moran, Diana, and Leonessa, 2016. During a visuospatial working-memory task, 15 Hz (240 Hz and 255 Hz) improved accuracy and changed cortical network measures. The 5 Hz and 10 Hz beats, and the non-beat audio controls, did not. In that study the lower accuracy sat with the slower beats. "More relaxed" is the wrong setting for that task. Their lower tone was in the right ear. Here the lower tone is on the left. The beat is still 15 Hz. Play it while you do the work, which is when they played it. The meta-analysis prefers pre-task exposure in general. Both facts are true, and they are not the same experiment.

Memory, 40 Hz follows Jirakittayakorn and Wongsawat, 2017. Thirty minutes of a 40 Hz binaural beat increased gamma and then beta activity in frontal, temporal, and central electrodes within about 15 minutes. In a second experiment, 20 minutes of the same beat increased recall for the working-memory portion of a word list and shifted mood scores in the same direction as the EEG change. The paper's abstract does not give the carrier. The tones here, 320 Hz and 360 Hz, are the 40 Hz pair Reedijk, Bolders, and Hommel published in 2013, chosen because that pair is fully specified and sits on a 340 Hz carrier. Noise is off. Garcia-Argibay's meta-regression did not find an advantage for masking, and a later methods paper argued that unmasked beats are the cleaner test.

Flexibility, 40 Hz follows Hommel, Sellaro, Fischer, Borg, and Colzato, 2016. A 40 Hz beat on a 340 Hz carrier, in white noise, pushed cognitive control toward flexibility on a dual-task. They played it for 3 minutes before the task and during the task. This card is 10 minutes, so you can start it before you begin. Reedijk added band-limited white noise from 20 Hz to 10 kHz, citing Oster, to make the beat easier to hear. The white noise here is full-band.

Divergent, 10 Hz is the other Reedijk condition: 335 Hz and 345 Hz, white noise. Across people, beats affected divergent thinking and not convergent thinking. The benefit was not universal. Listeners with a low spontaneous eye-blink rate, a rough stand-in for striatal dopamine, gained more from the alpha beat. Listeners with a high blink rate were unchanged or worse under both alpha and gamma. If 40 Hz makes the work feel noisier, switch to this card, or stop. That interaction is the useful result of the paper.

Visual 2-back is an 8-minute 10 Hz beat on a 240 Hz base tone, played during a dual 2-back. In the visuospatial half, 10 Hz shortened response time and reduced the drop in sensitivity across the block. In the verbal half, hit rate and sensitivity went the other way. Use it for a visual memory drill, not for listening to speech. 16 Hz and 40 Hz were in the same trial and did not show that visual pattern. Which ear got 240 Hz was randomized. Here the lower tone is on the left.

Sentences, 18 Hz is 250 Hz and 268 Hz for 10 minutes before an auditory sentence task. In the EEG study, accuracy and speed improved, more so on the harder object-relative sentences, and beta power rose during the sound. An earlier behavior study with 200 people also found a gain from 40 Hz (250 Hz and 290 Hz) on the same kind of sentence, and no gain from 7 Hz. The EEG follow-up kept the behavioral gain only at 18 Hz. The tones in both papers sat inside slow music, about 2 dB under the music. This card is the tones alone. There is a separate 40 Hz card for the behavior-only result.

Training, 40 Hz is Ross and Lopez, 2020: 420 Hz and 460 Hz during attentional-blink practice. The sound file was 15 minutes. People did not get better inside the session. They got better the next day, and the 40 Hz day helped that later gain more than a 16 Hz day (431.85 Hz and 448.15 Hz). Play it while you practice, then sleep. The gain is not a same-hour trick.

Alertness

Alert, 40 Hz follows Melnichuk, Cooper, and Hawk, 2025. They crossed beat rate (16 Hz or 40 Hz), carrier (340 Hz or 400 Hz), noise, and whether the sound started before the task. Average hits on a vigilance task rose for 40 Hz at 340 Hz, and white noise helped that behavioral score. The same noise weakened the EEG following response. 16 Hz did not raise performance. Nothing in the study stopped the normal fade of vigilance across the task. The card is 320 Hz and 360 Hz with white noise for 30 minutes while you work. It is not a promise that attention will stay flat.

Arousal, 24 Hz holds the higher of the two beta rates in Lane, Kasian, Owens, and Marsh, 1998. During a 30-minute vigilance task, beta at 16 Hz and 24 Hz, in pink noise, produced more hits, fewer false alarms, and less negative mood than theta and delta at 1.5 Hz and 4 Hz. Lane did not publish the carrier and did not say he held 24 Hz alone. This card uses a 340 Hz carrier, the window where beats are easiest to hear, and keeps 24 Hz for the full 30 minutes so the drive stays at the top of his pair. The alternating 16/24 card is still there. A two-minute 16 Hz exposure in a later EEG study did not change vigilance, so this is the long session, not a two-minute burst. The tone level is higher than the other cards. That makes the flutter stronger. It does not raise the dose above what a comfortable volume already is.

Arousal, bare 40 Hz is the same 320 Hz and 360 Hz pair with the noise turned off and the tone turned up. In the 2025 parametric study, EEG power at 40 Hz was highest when white noise was absent. The average-hit gain sat with the masked card. Use the bare card when you want the stronger following response. Use the masked card when you want the score that moved. A separate 40 Hz study on the attention-network test, carrier 340 Hz versus a 380 Hz tone, found no change in alerting, orienting, or anxiety. High rate is not a general switch for feeling wired.

What the evidence actually supports

The best single summary for behavior is still Garcia-Argibay, Santed, and Reales, 2019, in Psychological Research. Twenty-two studies, 35 effect sizes, overall Hedges' g = 0.45 for memory, attention, anxiety, and pain perception. Frequency, duration, and timing changed the size of the effect. Longer exposure did more. Listening before the task did more than listening only while you worked. Masking with white or pink noise was not required. A 2022 meta-analysis of memory and attention alone (15 studies, 31 effect sizes, PMID 35842538) found g = 0.40, with conflicting results for theta versus beta. Medium effects with mixed follow-ups are not a blank check.

Chaieb, Wilpert, Reber, and Fell, 2015, reviewed auditory beat stimulation and found the most consistent behavioral change in anxiety. Memory and mood were mixed. Theta was the band most often tied to lower anxiety, and the same review notes a study in which theta exposure lined up with a worse depression score. Do not use the theta cards as a depression treatment. The 2024 anxiety and depression review in Applied Sciences walks through the same split: alpha around 8 to 13 Hz for relaxation protocols, beta around 13 to 30 Hz for alert protocols, gamma from about 30 Hz up for high-arousal protocols, with carriers scattered from under 200 Hz to several hundred.

Pain shows up inside the 2019 meta-analysis as one of the pooled outcomes. This generator does not include a pain program, because the trials differ in frequency and in whether the sound was the only intervention. Lower anxiety and a bit of masking can change how pain feels. That is not analgesia you can schedule.

The EEG story is stricter than the app-store story. Ingendoh's 6-of-14 result is the one to remember. Orozco Perez, Dumas, and Lehmann, 2020, did see cortical following at 7 Hz and at 40 Hz, and they saw a stronger following from monaural beats. If you care about the electrical following more than about the headphone illusion, use the monaural switch. You will hear a louder pulse, including on speakers.

What these papers do not support: a cure for insomnia, a treatment for ADHD, a creativity switch that works for every listener, or a special status for 432 Hz. Kennel and colleagues looked at beta beats in children with ADHD and the result was limited. The white-noise result in children with attention problems is a different mechanism and is not reproduced by these cards.

White noise, pink noise, and brown noise

Noise on this page is not a binaural beat. White noise has roughly equal energy per hertz, so it sounds like hiss and it covers sudden noises that would otherwise poke through a quiet room. Pink noise falls by about 3 dB each octave, so it has more low-frequency energy and sounds warmer. Brown noise falls by about 6 dB each octave and is mostly rumble.

Oster noted that a noise bed can make a weak beat easier to notice. Garcia-Argibay's meta-regression then found that the behavioral effect did not depend on that mask. Both can be true: noise can change clarity without changing the average outcome. The calm, memory, and theta cards therefore default to no noise. The Lane cards and the Reedijk cards include the noise those labs used. You can turn it off.

Do not confuse this pink noise with the closed-loop pink-noise pulses in Papalambros and colleagues, 2017. That experiment timed brief pulses to the sleeper's own slow waves and reported deeper slow-wave sleep and a memory change in older adults. This page has no EEG and cannot time anything to your brain. Continuous pink noise is only a mask.

The white-noise attention paper people quote, Söderlund, Sikström, and Smart, 2007, was in schoolchildren and fits a stochastic-resonance account of attention, not a binaural-beat account. Adult white-noise sleep studies are small. Use the noise cards to cover traffic and hallway sound. The brown-noise card is there because the spectrum is a real, requested mask. The clinical evidence for brown noise is thin, and the card does not pretend otherwise.

How to listen

1. Put on headphones. Press "Test left ear" and "Test right ear". The two tones should sit on different sides. If both stay in the middle, the plug or the Bluetooth device is downmixing to mono, and binaural mode will not work. Switch to monaural, or fix the audio path.
2. Pick one card. Leave the sliders alone if you want that protocol. Moving carrier, beat, tone, or noise turns the session into a custom tone and drops the scripted glide.
3. Set the volume so a person in the room could still talk to you. Browser volume is not sound pressure. Studies that report a level are usually near a quiet conversation, around 50 dB. Louder does not make the beat more effective. It makes hearing damage more likely.
4. For focus, the 15-minute beta card is meant to finish before you start. The 15 Hz memory card is meant to run during the task. The 40 Hz memory card matches the 20-minute pre-test exposure. You do not need all three in one day.
5. For bed, use theta, sleep onset, or dynamic delta, with the lights already low. Do not use beta or 40 Hz when you need to fall asleep. Lane's own comparison used theta and delta as the low-arousal condition: it was worse for vigilance, which is what you want at night.
6. Stop if you feel irritable, dizzy, or headachy. A session you can see is not a blinded clinical session. If nothing happens after a fair trial of a week, that is a result the literature allows.

Safety

This is a sound generator, not a medical device, and not a diagnostic test. It does not treat anxiety disorders, insomnia, ADHD, depression, pain, or epilepsy. People with epilepsy should ask a clinician before any strong rhythmic stimulation, especially near 40 Hz, where auditory steady-state responses are large. Do not use the page while driving, cycling, or operating anything that needs full attention. Delta and theta are supposed to lower arousal. Beta is supposed to raise it. Either one is a bad idea behind a wheel.

Keep the volume down. A pure tone is more fatiguing than a song at the same knob setting, because the energy sits on one frequency. If you have tinnitus, prefer the noise cards at a low level or skip the tones. Children are not the audience for these protocols. The ADHD studies that exist are small and are not a home program. If you are pregnant, in a psychiatric crisis, or living with a hearing injury, talk to a clinician before you make this a daily practice.

Updated 1 October 2026. The generator is static: two sine oscillators, a hard left-right split through a channel merger, and a noise source. There is no account and no upload.

FAQ

What are binaural beats?

A binaural beat is the flutter you hear when each ear receives its own pure tone and the two tones differ by a few hertz. The beat rate is the difference between the tones. Headphones are required. Heinrich Wilhelm Dove described it in 1839, and Gerald Oster mapped the useful range in Scientific American in 1973.

Do binaural beats work?

The flutter is a real auditory effect. Effects on mood and performance are modest and depend on the frequency, the task, and when you listen. A 2019 meta-analysis of 22 studies found an overall effect of g = 0.45 on cognition, anxiety, and pain perception. A 2023 review of EEG studies found a power increase at the beat frequency in only 6 of 14 papers. Binaural beats are not a treatment.

Which binaural beats frequency is best for sleep?

There is no single best frequency. A 6 Hz theta protocol at 250 Hz and 256 Hz, played for 15 minutes, raised theta EEG power in people with primary insomnia. A 2025 review of three insomnia trials reported a moderate drop in insomnia severity. Delta, near 2 Hz, is the band used for the last part of a wind-down. The evidence base is still small.

Which binaural beats frequency is best for focus and memory?

Match the frequency to the job. In one working-memory study, 15 Hz (240 Hz and 255 Hz) improved accuracy, while 5 Hz and 10 Hz did not. For vigilance, beta beats at 16 Hz and 24 Hz beat a theta and delta program. For a word list, 20 minutes at 40 Hz increased recall of the working-memory part of the list. A lower frequency is not automatically better.

Do I need headphones for binaural beats?

Yes. Each ear has to receive only its own tone. Speakers leak both tones into both ears, so the binaural beat collapses. Monaural beats are the version that works on speakers. A 2020 study found that monaural beats entrain the cortex more strongly than binaural beats.

What is the difference between binaural beats and white noise?

A binaural beat is two pure tones, one in each ear. White noise is random energy across frequencies, used to cover sudden sounds. A meta-analysis found that masking beats with white or pink noise is not required for the outcome. Pink noise falls by about 3 dB per octave. Brown noise falls faster and is mostly a low rumble. This generator keeps the beat and the noise on separate controls.

Are binaural beats safe?

At a comfortable volume they were generally tolerated in the studies cited here. Keep the level where a conversation would still be easy. Do not use them while driving or if the sound bothers you. People with epilepsy should ask a clinician before rhythmic auditory stimulation, especially near 40 Hz. This page is not a medical device and does not treat anxiety, insomnia, ADHD, depression, or pain.

What carrier frequency should binaural beats use?

The beat is easiest to hear when the tones sit roughly between 300 and 600 Hz. Oster found the clearest beats near 440 Hz. They fade as the tones approach 1000 Hz, and they are hard to separate from the tone itself at very low carriers. Beat rates above about 30 Hz are difficult to hear as a flutter, even though 40 Hz stimulation still shows a following response in EEG studies.

Sources

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