What the Dreem Band measures at night

The Dreem Band collects data from various sensors:

  1. Accelerometer for body movement and breathing measurements
  2. Proprietary dry EEG sensors (skin & hair) with similar quality as medical polysomnography for brain activity monitoring
  3. Pulse oximeter for heart rate measurement


Once collected by our different sensors , your night looks like this:


This is the EEG (or electroencephalogram), a visualization of the waveform and intensity in microvolts of electrical activities of large group of brain cells. The shape of the EEG waves, their frequency, and their intensity or amplitude are the key components for sleep staging.

Detection of your sleep stages

Once the EEG detected, Dreem algorithm works to determine your sleep stages throughout the night. The result is the hypnogram you can see every morning.


Learn more about how Dreem algorithm works

Accuracy of the data collected relies on a good positioning of the headband. To learn more about how to wear it, visit How to put Dreem on.

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