Every 30 seconds, your headband calculates your sleep phase thanks to machine learning algorithms. Indices that allow the algorithm to determine that you are awake are:
- You blink;
- Your eyes are closed but your brain activity emits a frequency band (alpha) characteristic of the alarm clock;
- Your brain activity has a strong activity in the frequencies of awakening (range, beta);
- The accelerometer measures one or more important movements.
Learn more about sleep stages detection.