What each beat is used for
Each beat is named for the brain rhythm it sits in, and each has a use the app builds on. Alpha, 10 Hz, is the rhythm of relaxed, steady attention, so the app plays it in the steps where your hands are busy with massage or a mask, in Puffy or inflamed, Pre-event glow and the perimenopause routine. Theta, 6 Hz, is the rhythm meditators most often show, quiet and inward without tipping into sleep; it is in the builder for your own routines, and Stressed, breakout-prone and Seasonal change close on its slower neighbour, 4 Hz, at the edge of sleep. Delta, 2 Hz, is the slowest band, the one linked with deep sleep, and it closes five of the evening routines.
Those bands come from decades of brain-rhythm research, and the uses follow from them. Whether a beat draws the brain into its band is still being worked out; what the trials have measured, for stress, anxiety and sleep, follows.
What a binaural beat is
Play 150 Hz in the left ear and 160 Hz in the right and you hear neither tone wobbling; you hear a soft pulse ten times a second that is not in either channel. The brainstem, comparing the two ears, produces it. Heinrich Dove described the effect in 1839 and Gerald Oster made it widely known in 1973, and it only works when each ear hears only its own tone, which is why these players ask for headphones. Through a speaker the two tones mix in the air and you hear two faint notes and nothing else. On Speakers, the player does what the app does out loud and pulses the loudness of a single tone at the same rate instead, which is an alternative sound rather than the same effect.
The names on the presets, alpha, theta and delta, are the EEG bands the beat rates fall in. They label the rate of the beat, which is the difference between the two tones. They are not a measurement of your brain, and a beat at 10 Hz does not mean your brain is running at 10 Hz; whether it nudges it that way is the entrainment question below.
What the trials show for stress and anxiety
The binaural literature is small and the trials mostly point the same way. A 2019 meta-analysis pooled 22 studies across anxiety, attention, memory and pain and found a medium overall effect, larger with longer listening. A 2024 systematic review limited to randomised controlled trials of personal, non-clinical listening found that every one of the five trials measuring a physiological stress marker, salivary cortisol or alpha-amylase, showed a significant difference from the control group, while calling the overall picture promising but equivocal because the trials differed in design. In June 2026 a randomised trial of 66 students with poor sleep had one group listen for thirty minutes before bed, five nights a week for four weeks, to a 3 Hz beat with music, against pink noise with music and against nothing; the beat group reported less stress than both other groups at four and six weeks and better sleep from the second week, with no difference in morning cortisol; the students knew which sound they had.
On the beat reaching the brain, a 2017 EEG study played a 6 Hz beat to 28 people for thirty minutes and found theta activity rose across the scalp within ten minutes, significantly more than in a silent control group at the frontal and parietal-central sites, a pattern the authors compared to meditation. A 2023 systematic review of fourteen entrainment studies found five supporting the idea, eight against and one mixed, so whether the beat tunes the brain to its rate is still an open question. The stress and anxiety results stand on their own, whichever way that question goes.
How a lower stress response reaches skin
A binaural beat reaches skin the way every page on this site describes: stress raises cortisol, cortisol increases sebum, drives inflammation, weakens the skin barrier and slows healing, and it also fragments the deep sleep in which growth hormone is released and collagen is made. Lower the stress response for long enough and the skin has calmer conditions to work in. The dermatology on cortisol and skin is well established; the sound end of the chain is the part with the smaller trials above. Both are laid out, study by study, on the science page.
Where the research is now
The chain from beat to calmer body to better skin is made of links that have each been tested. The skin outcome at the end of it, a blemish count or barrier recovery after weeks of listening, is the study still to be done, and it is the one limit worth naming on this page. The trials so far are short and small, mostly in students, and people can tell when they are hearing a beat, so the stress and sleep results are early and encouraging rather than settled. That is why the routines are offered as support for the stress and sleep side of skin, the side the research reaches, and why the app plays them long enough, and in sequence, to give that support room to work.
One beat, or a sequenced routine
This player gives you one beat at a time with a timer, and that is enough to find out whether you like the sound and settle under it. In the trials the listening was twenty to thirty minutes, with the sound held steady. A routine in the app runs that way too, and then goes further: a 7.83 Hz beat to settle in, theta to let go, delta to carry you towards sleep, each over a brown-noise bed, with steady solfeggio tones as steps between them, in an order chosen for a skin concern and timed to your evening skincare if you want it. The free ten-minute routine plays three such steps on the same engine, so you can hear the difference between an ingredient and a recipe before deciding.
How to use the player
Put headphones on, choose a beat and five or ten minutes, and set the volume low enough to hear the room. Alpha, 10 Hz, suits a quiet moment with your eyes open, a massage or a mask; theta, 6 Hz, the rate of the 2017 EEG study, is for sitting or lying down with your eyes closed (the app's evening routines use a slower theta at 4 Hz, and its builder offers both); delta, 2 Hz, is for the last part of the evening and sits at the top of the band the sleep studies used. The player is capped at twenty minutes and fades out over the last minute. If the pulse ever feels uncomfortable, switch to Speakers, which is a gentler sound, or stop.
Sources & further reading
- Oster, G. (1973). Auditory beats in the brain. Scientific American, 229(4), 94–102. PubMed
- 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. PubMed
- Is non-clinical, personal use of binaural beats audio an effective stress-management strategy? A systematic review of randomised control trials (2024). Advances in Mental Health, 23(2). tandfonline.com
- Hou, Wang, & Yue (2026). The impact of sound intervention on sleep quality and stress levels in college students: a randomized controlled trial. Frontiers in Psychology, 17, 1859138. frontiersin.org
- Jirakittayakorn, N., & Wongsawat, Y. (2017). Brain responses to a 6-Hz binaural beat: effects on general theta rhythm and frontal midline theta activity. Frontiers in Neuroscience, 11, 365. PubMed
- 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. PLoS ONE, 18(5), e0286023. journals.plos.org
- Zari, S., & Alrahmani, D. (2017). The association between stress and acne among female medical students in Jeddah, Saudi Arabia. Clinical, Cosmetic and Investigational Dermatology, 10, 503–506. PMC
Sources opened and checked on 17 October 2026. How these pages treat a study is set out in how we read a study.
Skin Resonance is a wellness web app, not a medical device, and does not diagnose, treat or cure any condition. For a diagnosed skin condition, please see a dermatologist.
Frequently asked
Do binaural beats work without headphones?+
No. A binaural beat exists only when each ear hears its own tone and the brain compares them. Through a speaker the two tones mix in the air into two faint notes. The player’s Speakers option plays the beat as a pulse in the loudness of one tone instead, the way the app does out loud, which is a different kind of sound rather than a binaural beat through a speaker.
Which binaural beat frequency is best for skin?+
The beat works on you rather than on the skin directly, so the question is which rate suits the state you want. The 2019 meta-analysis found larger effects with longer listening, and the sleep studies used delta-range beats of 0.25 to 3 Hz before bed. For a daytime moment alpha at 10 Hz is the usual choice. The app orders them, 7.83 Hz, then theta, then delta, for an evening wind-down.
Can binaural beats lower cortisol?+
The 2024 systematic review found that all five randomised trials measuring salivary cortisol or alpha-amylase showed a significant difference from control, and a 2026 trial found no difference in morning cortisol after four weeks while self-rated stress fell. The direction is encouraging and the trials are small, so a careful reading is that binaural beats lower the stress response in the short term, with the hormone measurements still thin.
Are binaural beats safe?+
For most adults, yes, at a comfortable volume: it is ordinary sound, and the trials reported no adverse events; one four-person pilot recorded a slightly lower mood score after a session, which is a reason to keep the volume low and stop if it feels wrong. If you have epilepsy or a seizure disorder, tinnitus or a hearing condition, or you are pregnant, check with the professional who looks after you first, and do not listen while driving. Stop if the pulse feels uncomfortable.