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Patrick Teich:

Designing a Brain Computer Interface Using an Affordable EEG Headset


Brain computer interfaces (BCIs) are still not wide-spread. Compared to other means of control, they currently do not provide much usability. However, for highly motor-disabled people they are the only means of communication to the outside world. Using them to provide such people a way to command some devices, these devices could expand the abilities of a person. Thus, giving highly disabled people back some of their autonomy.

Considering the usually high price of recording technology necessary to build BCIs, this work examines the question, whether it is possible to also employ a consumer-priced EEG headset. Towards this goal an Emotiv EPOC EEG headset is used to design and build a proof-of-concept system that realises a BCI for arbitrary control over some device.

As a result, a prototype has been implemented that comprises analysis, transformation, and classification through a linear discriminant analysis of the recorded signals and that allows device control through the means of brain signals. In addition to the evaluation whether the concept is working, a number of possible further improvements and considerations are given in order to achieve a more mature state.

Master of Science (M.Sc.)