Sleep stages detection

Signal detection by the headband

The sleep stages displayed on the "HOME" section of your Dreem app is based on three sources of information:

  1. The EEG (or electroencephalogram) which detects your brain activity
  2. The accelerometer which measures your movements and breathing
  3. The heart rate monitor (or pulse oxymeter)

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Detection of your sleep stages

All these informations lead a calculation every 30 seconds of your hypnogram. It allows you to see your different sleep stages and can be viewed each morning on the Dreem app.

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Learn more about how Dreem algorithm works

 

Sleep stages seem wrong?

Several reasons may explain that your sleep stages seem wrong to you:

  • Poor signal quality. Please consult our dedicated article How can I improve my signal quality
  • The hypnogram available on the "HOME" section of the Dreem app has been smoothed for a better comprehension. This might lead to a few inconsistencies. For example, awakenings displayed on the hypnogram might not be felted by the users. 
  • The subjective level of well-being experienced might differ from the calculation made by the headband.
  • A loss of your headband during a sleep session might also cause gaps and inconsistencies in your hypnogram. 
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