Circuit Lake

Electronic Project and Circuit Collection

OpenEEG software

11/19/2008 Category: Software

EEG is an instrument that measures electrical potentials on the scalp and generates a record of the electrical activity of the brain. Also called encephalograph.

The OpenEEG project have developed a low cost EEG machine that can be built by any person possessing basic skills in electronics assembly. Many people are interested in what is called neurofeedback or EEG biofeedback training, a generic mental training method which makes the trainee consciously aware of the general activity in the brain. This method shows great potential for improving many mental capabilities and exploring consciousness. Other people want to do experiments with brain-computer interfaces or just want to have a look at their brain at work.

This application, released as free software under the GNU GPL v2 for Linux and Windows, is designed for getting a rapid visual understanding of recorded brain-wave data. It uses FFT-accelerated convolution to do the analysis, which enables much greater flexiblity than using the traditional FFT-of-windowed-data approach. The frequency is plotted on a log scale, which is much better for viewing data that includes a wide range of frequencies. The window size is proportional to the wavelength at any frequency, so the convolution is effectively being done with a complex wavelet at various different scales. The ratio of window size to wavelength can be varied easily to allow different aspects of the data to be shown.


Visually displays EEG data.

Platforms: Linux, Windows

related search : biofeedback, EEG, OpenEEG, bio electronic (src)