Sound frequencies
Binaural beats and solfeggio tones, generated live by the app's own audio engine.
Stress reduction
Lower cortisol, higher heart-rate variability, reduced self-reported anxiety.
Skin health
Less inflammation, better sleep quality, and the deep rest that drives cellular repair.
The chain itself, whether listening to these frequencies directly improves skin outcomes, has not yet been tested as a single hypothesis. We do not claim it has.
What each sound in the app is used for
Every sound in the app has a job in a routine, and these are the app’s own descriptions, the ones you see when you build a routine of your own. Choose by what you want the next half hour to feel like: settling, steady, drowsy or alert. The research behind the whole approach, sound to stress to skin, is in the tabs below.
Binaural beats for rest
Headphones give a slightly different tone in each ear; on speakers they play as pulsed tones. Each is named for the brain rhythm it sits in.
The slowest band, linked with deep sleep. For the end of an evening routine or before bed. Try it free
Deep relaxation at the edge of sleep, where images and ideas surface.
The rhythm meditators most often show. Quiet and inward without tipping into sleep. Try it free
A low, even beat for settling in at the start of a routine. Try it free
Relaxed, steady attention. Suits massage, a mask or any step where your hands are busy. Try it free
Relaxed but clear, at the top of the alpha range. A lighter close, so you come back alert.
Focus beats
Faster beats for alert, focused attention rather than rest. Better for the daytime than the hour before sleep.
The low end of beta, alert without being busy. Brings you back up after a rest.
Low beta, for steady attention on everyday tasks.
Active concentration, for work that needs you switched on.
The fastest of the beta beats, for full alertness. Best kept short.
A growing area of research into concentration and memory.
Solfeggio tones
Steady single tones with a slow pulse, offered for relaxation. They sound the same on headphones and speakers. The names come from tradition rather than research.
The lowest and warmest of the nine tones, for easing physical tension.
A soft, steady tone for rest and repair.
Grounding and settling, a good first step after a busy day.
For letting go of the day and the feelings that came with it.
The best known of the nine, for restoration. Try it free
A warm, open tone for feeling at ease with others and yourself.
Brighter, for clarity. Suits a morning routine.
High and light, for quiet inward attention.
The highest of the nine, for stillness.
Rest
Between and under the frequencies.
Deep, soft noise like a distant river, with no tone. For resting between frequencies, or on its own.
Silence between steps, to notice how you feel.
Sound frequencies reduce stress markers
Multiple studies have found measurable effects: reduced cortisol, increased heart rate variability, lower self-reported anxiety. The field is still developing and methodologies vary, which means future research will refine what we know. What’s already established is that sound-based interventions can move the body out of stress states. The studies below range from systematic reviews to small pilot trials. The field has not yet produced a large multi-site RCT, which is the standard a fully established intervention would need to meet. What it has produced is consistent direction across multiple smaller studies and review papers.
Explore every article
Plain-language, well-cited articles that expand on each link in the chain above. The free sound tools let you hear one beat or tone at a time with its research beside it, and every evidence section is written to the standard in how we read a study.
What this means for Skin Resonance
Each link in the chain is supported by published research. Sound frequencies can reduce stress markers. Stress hormones demonstrably affect skin. Poor sleep impairs skin repair. Skin Resonance connects these three findings into a practical tool that supports the physiological conditions your skin needs to restore itself.
We do not claim that a specific frequency "fixes" a specific skin problem. We support the calm, low-cortisol, deep-sleep states that research links to better skin.
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