Muse
EEG & PPG Headset
The Muse S and Muse 2 are research-grade EEG headbands for meditation and sleep. Visit the Muse website to learn more.
Using it in the platform
The Muse 2 headband is only compatible with Chromium-based browsers, which include Google Chrome, Microsoft Edge, and Opera.
To connect, you don’t have to download anything. Simply turn on the device and proceed to connect it through the application using Bluetooth. If you have connectivity issues, oftentimes the best solution is to restart the device.
Signals
Sensors
EEG: electroencephalography measures brain activity by capturing electrical activity from the brain. This device has four EEG electrodes meant to capture information from the frontal and temporal lobes of the brain as measured through the scalp.
PPG: photopletismography measures changes in blood flow through light absorption or scattering by the hemoglobin in the blood.
Output
EEG raw signals
According to the 10-20 international system, the Muse has the following electrodes.
TP9
TP10
AF8
AF7
EEG band power
Band power quantifies a signal's strength in a specific frequency range. The value provided is the average power across all electrodes. The calculation is performed using a fast Fourier Transform at 20 Hz on a 2-second window
Theta: 4 - 8 Hz band power
Alpha: 8 - 12 Hz band power
Low beta: 12 - 16 Hz band power
High beta: 16 - 25 Hz band power
Gamma: 25 - 45 Hz band power
Other
PPG: raw signal obtained by the light sensor
Heart rate: heart rate calculation from PPG
Attribution
To connect to the Muse on the browser, we used the implementation provided on the following GitHub.
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