Last Updated on November 29, 2022 by pg@petergamma.org
Rob Ter Horst tested so many sleep trackers, which is great. But what are all those sleep trackers compared to EEG sleep trackers? Rob and many other reviewers tested the Dreem 2 headband, which had a lot of positive feedback. There is also a scientific paper which has tested the accuracy of the Dreem 2.
Unfortunately, Dreem 2 is not avialable anymore for the general public. It is available for scientific studies. But is it worth his price? The Muse S has the same number of EEG channels than the Dreem 2 headband. It also offers an app which shows sleep score, sleep duration, start of sleep, end of sleep. Although the Muse S does not offer so many features than the Dreem 2, we suppose that it s accuracy is similar to the Dreem2.
Both devices are developed as far as we know by medical doctors. Medical doctors usually aren t experts in software and hardware developement, which develop completely new soft- and hardware products. Therefore as far as parameters they can measure, we suppose they are comparable.
Both devices are more accurate than most sleep tracking devices Rob ter Hors tested. If we remember right, the most accurate ones have an accuracy of around 0.80 compared to a Dreem 2 headband. And still the Dreem2 headband Rob ter Horst uses as a reference device is not very accurate, if we remember right, the Dreem2 has an accuracy of about 0.80 compared to a professional Polysomnography device. This is not very accurate.
The Dreem 2 can be found on ebay, but prices for it vary between 500 USD and 1000 USD. Is it worth it? A Muse S can be found there for about 200 – 300 USD, and we suppose the accuracy can be compared to a Dreem 2 headband.
Starting from 230 USD, we can buy a OpenBCI Cyton board on Aliexpress with 8 channel EEG, which is twice of the channels of the Dreem 2 and the Muse S.
There is an instruction available how to build a sleep lab with OpenBCI:
OpenBCI modules with 16 channels can be found on Aliexpress for around 500 USD, which further increases the accuracy of the sleep lab.
The sleep lab described above is based on Matlab. But there is also a Python Sleep software available:
Sleep: An Open-Source Python Software for Visualization, Analysis, and Staging of Sleep Data:
https://www.frontiersin.org/articles/10.3389/fninf.2017.00060/full
EEGLAB does not only run in Matlab but also in Octave and in the compiled version of Matlab. We therefore suppose that the Sleep Lab software also runs in Octave and in the compiled version of Matlab.