Muse’s newest feature, Deep Sleep Boost, uses brain-wave timing to strengthen your deepest sleep

A wearable that uses your brain activity to deepen sleep.

Published on Feb 9, 2026 by Ash Read

If you’re sleeping seven or eight hours a night but still feel beat, the problem isn’t how long you sleep—it’s how deep. Muse’s new Deep Sleep Boost feature targets slow-wave sleep, the stage most closely linked to physical recovery, memory consolidation, and brain health, using real-time brain monitoring to deliver precisely timed sound cues that strengthen deep sleep without waking you up.

How it works

Deep Sleep Boost runs on the Muse S Athena headband, which combines EEG and fNIRS sensors to track brain activity overnight. When the system detects slow-wave sleep, it delivers whisper-quiet pink-noise cues timed to match the brain’s slow oscillations, reinforcing and stabilizing deep sleep without waking you up.

Muse’s AI models were trained on large-scale EEG data to detect slow-wave sleep and sync stimulation to the right phase of each brain wave. A built-in safety feature automatically pauses stimulation if it detects signs of disruption.

Users can adjust intensity and timing preferences, and premium subscribers can layer Deep Sleep Boost with other sound tools in Muse’s library.

Why target deep sleep?

Research provided by the brand on acoustic stimulation during slow-wave sleep shows meaningful results: studies found that it increased slow-wave activity by nearly 50% and improved overnight memory retention by about 20%. In trials with Alzheimer’s patients, nightly acoustic stimulation increased the proportion of sleep spent in deep, slow-wave sleep by approximately 60%.

Deep Sleep Boost translates that research into a consumer feature designed for consistent home use. The challenge in sleep tech isn’t just tracking—it’s intervention. Most wearables tell you how poorly you slept after the fact. Muse is building tools that actively improve sleep quality in real-time by responding to what your brain is doing, not just recording it.

Deep Sleep Boost supports your brain’s most restorative sleep stage.

Part of a full sleep system

Deep Sleep Boost joins Muse’s existing Sleep, by Design features:

Sleep Assist uses EEG-guided acoustic cues to help users fall and stay asleep—with users reporting falling asleep 55% faster.
Smart Alarm, launching later in 2026, will use EEG-informed timing to wake you during lighter sleep phases, reducing morning grogginess.
Enso, Muse’s AI coach, breaks down your sleep data with clear explanations to help you understand nightly patterns over time.

The approach: fall asleep faster, sleep deeper, and wake up clearer.