A 3-second face scan maps the bone structure that decides which frequencies travel through your head best. Every sound in your session is built on that one note. No two people get the same audio.
Warmth that never changes.
A steady, resonant hum built from your frequency and its harmonics. It holds one shape all night — nothing rises, nothing resolves, nothing pulls you back awake.
Cochrane review · 13 trialsListening to calm audio at bedtime improved sleep quality in adults with insomnia symptoms.
Cochrane Database Syst Rev 2022 · CD010459The feeling of being carried.
Flowing water, synthesised rather than looped, over filtered noise that softens the room. Shaped to your frequency so it cradles the other layers instead of covering them.
Meta-analysis · 18 studiesNatural sound lowered stress and lifted mood. Water produced the single largest effect of any sound type.
PNAS 2021 · 118(14) e2013097118A lullaby that becomes a brainwave.
The notes of a lullaby, drawn from a clinically proven musical scale — the note pattern shown in sleep-lab studies to help people fall asleep faster — and spatially spread between the two pads. Where the spread waves meet inside your skull they interfere, and that interference is the slow wave: 2 to 4 Hz, the rhythm your brain runs on in deep sleep. You never hear a pulsing beat. You hear a melody. The slow wave rides underneath it.
Polysomnography · the scaleMelodic sequences built on this scale shortened the time to fall asleep and to reach deep sleep versus silence, with raised delta activity.
Psychology of Music 2025 Clinical study · Spatial SleepAdults with moderate-to-severe insomnia used the band for four weeks. Insomnia severity fell from 19.8 to 8.5 — past the benchmark for meaningful improvement — with no adverse events.
J Sleep Med 2025 · 22(1):26–31 Polysomnography · the slow waveA 3 Hz auditory beat raised delta activity and lengthened deep sleep against a no-sound control.
Front Hum Neurosci 2018 · 12:387Out of the box, a session runs all three layers together, each with a job.
Over the session, the layers gradually simplify and fade — the stack does less as you need less, ending in near silence.
Some people settle into a pure, steady tone. Others need the movement of water. In the app, choose which layer leads:
Whichever you choose, the spatial soundscape stays. It is the layer doing the slow-wave work — the other two are there to make it comfortable to live with, night after night.
Your forehead is not an arbitrary place to put a speaker. It is one of the most densely wired patches of skin on your body, and the wire runs somewhere useful.
Patients lacking functional PIEZO2 could not detect vibration that every control participant felt, confirming the channel transduces mechanical stimulation in humans.
N Engl J Med 2016 · 375:1355 Clinical case seriesStimulation of the trigeminal pathway at the forehead improved insomnia symptoms and sleep efficiency in older adults.
Psychiatry Investigation 2025Band, charger and two comfort liners.
