How does the Muse device track sleep?

The Muse device employs advanced sensors to monitor sleep patterns by tracking a variety of physiological signals. It uses an accelerometer to sense movement and detect changes in sleep stages, while PPG (Photoplethysmography) technology measures heart rate variability and detects changes in blood flow associated with the cardiac cycle. Alongside this, the device may utilize additional sensors to capture information related to breathing rate and body temperature. By integrating these data points, the Muse device applies algorithms to analyze sleep quality, duration, and cycles—thus providing detailed insights into the user's slumber and helping to improve overall restfulness.