Last Updated on August 18, 2023 by pg@petergamma.org
The sampling rate is usually expressed in Hz, for example 240 Hz is 240 times per second. The minimum acceptable sampling rate is 2.5 times greater than the highest frequency of interest but most digital EEG systems will sample at 240 Hz:
https://www.ebme.co.uk/articles/clinical-engineering/introduction-to-eeg
The OpenBCI EEG headset which was tested in this paper:
had a sampling rate
- the minimum is with 8 channels and Bluetooth and that is 250 Hz
- the maxiumum is with 8 channels and WIFI and that is 16 000 Hz shield
- with 16 channels and WIFI, a Cyton board still offers 8 000 Hz, which is much faster than with Bluetooth.