Sleep deeper. Focus harder. Calm faster.The world's first EEG earbuds — $124 off. Auto-applied at checkout.
What Smartbuds DoRead your brain in real time and respond with adaptive audio for the three things most people actually need: deeper sleep, quieter meditation, and locked-in focus. The same clinical-grade EEG that sleep labs use — in earbuds you can sleep, work, and unwind in. Final price drops to $225 — $124 off, applied automatically when you click below.
- 01Sleep deeper. Adaptive audio reads your brain during the night and guides you into more slow-wave sleep — the deep, restorative kind. Wake up actually recovered.
- 02Quiet the mind. Meditation that responds to your nervous system in real time, not generic narration. Settle in five minutes, not fifty.
- 03Lock into focus. Smartbuds know when your attention drifts and adjust the audio to pull you back in. Deep work without caffeine crashes.
Why EEG in earbuds is hard — and why it matters.
For decades, measuring brain activity meant a sleep lab: roughly 20 wet electrodes glued to a scalp, hours of setup, and a technician watching screens. Useful for medicine, useless for daily life. Consumer "brain-sensing" wearables have spent the last decade trying to bridge that gap — headbands, helmets, forehead patches — and most of them sacrificed signal quality for form factor, ending up neither comfortable enough to wear nightly nor accurate enough to be clinically meaningful.
NextSense's bet: the ear is the right place for an EEG sensor. The skin-to-bone proximity inside the ear canal makes it a remarkably clean neural recording site — closer to brain tissue than the scalp, with less hair and movement noise to contaminate the signal. The hard engineering problem isn't getting a signal. It's getting a clinical-grade signal from a 5-gram device you can sleep on without noticing.
NextSense ear-EEG captured 86.4% of focal seizures detected by traditional clinical methods — with a false alarm rate of just 0.1 per day.
What's actually in there.
A closed-loop, brain-to-sound interface.
Most sleep wearables run open-loop: they collect data, generate a score in the morning, and leave the rest to you. Smartbuds run closed-loop — the brain signal feeds an audio response in real time, and the response feeds back into the next reading.
Read
Six in-ear EEG sensors capture electrical activity from the brain through the ear canal. Two channels stream at 1,000 Hz to an onboard signal processor.
Classify
On-device machine learning identifies what state your brain is in — light sleep, REM, slow-wave (N3), or awake — with accuracy validated against polysomnography, the medical gold standard for sleep staging.
Respond
When the system detects you're entering slow-wave sleep, it delivers timed pink-noise pulses synchronized to your brain's slow oscillations — a technique called closed-loop auditory stimulation, shown in peer-reviewed studies to enhance deep sleep quality and next-day memory.
Adapt
The audio adjusts continuously as your sleep architecture shifts through the night. When you're deep, it goes quiet. When you're surfacing, it pulls you back down. When you wake naturally, it ends.
In a controlled beta period of 106 nights, Smartbuds increased slow-wave activity — the marker most closely tied to physical recovery and memory consolidation.
Brain interfaces, finally in something people will actually wear.
Consumer neurotechnology has been "five years away" for fifteen years. Earlier attempts — Muse, Dreem, OpenBCI, the now-retired Philips SmartSleep — proved the science but stalled on form factor. People won't sleep in a headband. They won't strap something to their forehead. The category needed a chassis that disappears into existing daily behavior.
Earbuds are that chassis. People already wear them for hours a day. Pairing clinical EEG with a familiar form factor is the missing piece that turns brain-computer interface from a research toy into a wearable category. Sleep is the first application because it has the clearest signal and largest market — but the underlying platform supports relaxation, focus, and mood states, with ongoing research collaborations exploring clinical applications.
Spun out of Alphabet's X (Google's moonshot lab) in 2020, NextSense raised an oversubscribed $16M Series A led by Ascension Ventures, with Satori Neuro and Corundum Neuroscience Fund. The founding team includes neuroscientists, engineers, and clinicians from the Google Health sleep research program.
Sleep deeper. Focus harder. Calm faster.
$124 off auto-applied at checkout — $225 (reg. $349). Free shipping. 30-night trial.