The brief
- Muse S Athena (March 2025, $475) pairs EEG brainwave sensing with fNIRS, which reads blood oxygen in the frontal brain.
- In 2026 it turned the headband into a sleep tool: sound timed to deep-sleep brainwaves and an alarm that waits for light sleep.
- Says it has decoded over 1 billion minutes of brain recordings and that 200+ outside-led studies have used Muse.
Technical approach
Dry brainwave sensors
Dry electrodes built into a soft band pick up the brain's tiny electrical rhythms without gel.
Light that reads brain oxygen
Near-infrared light shone into the forehead shows how much oxygenated blood the frontal cortex is using, a slower signal of mental effort.
Brain model trained on its own data
A model trained on years of Muse recordings classifies sleep stages and mental states from noisy home data.
Closing the loop with sound
The app plays sounds in response to the live signal: calm-weather cues while meditating, or soft pulses timed to deep-sleep waves at night.
