The Dreem 3 headband is made of plastic, foam, and fabric.
It records three types of physiological signals via sensors:
- Brain activity via electroencephalography sensors (EEG)
- Movements via a 3-D accelerometer
- And breathing frequency via a 3-D accelerometer and microphone
The EEG signal is measured by two electrodes in the frontal band (prefrontal position) and two at the back of the head (occipital position). One additional EEG electrode is used as a ground sensor to allow the micro-amplifier to work better.
The 3D accelerometer is embedded in the top of the headband to ensure accurate measurements of the user’s head position and breathing frequency during the night. Schematically, the EEG and accelerometer are converted for subsequent digital signal processing in the acquisition board and calculation board.
For audio, the headband is equipped with:
- A bone conduction speaker
In addition, the headband has the following components on its top arch:
- A power button, circled by an LED light
- A volume button to change sound volume
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Weight |
130g |
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Materials |
Hypoallergenic ABS Soft polyester fabric |
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Interface |
Sound feedback RGB LED indicator |
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Connectivity |
Classic Bluetooth 4.0 Low Energy Bluetooth 4.0 Low Energy Bluetooth Classic Wifi b/g/n 2.4Ghz |
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Dimension |
Head perimeter 540mm to 620mm |
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Battery Audio Compatibility |
520mAh Up to 25 hours Bone Conductor system iOS=11; iPhone 5S and more recent; iPod 6th generation and more recent. Android=5+ and supporting Bluetooth Low Energy and Bluetooth |
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Size |
One Size Fits All - Adjustable with XS, S, M, L spacers |
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Charging time Languages Sensors |
3h30 French - English - Spanish EEG sensors x4 and 1x ground sensor Accelerometer Microphone (optional) |