My master’s thesis project at Universitat Pompeu Fabra involved the real-time sonification of EEG signals in a biofeedback paradigm.

The goal of our research was esentially this:

To evaluate whether sonification techniques utilizing direct mappings or more complex arbitrary musical mappings of EEG oscillatory activity are better in terms of user perception and training within a biofeedback paradigm.

 
 
 
 
 

To answer this question, a multimodal sonification engine was developed in Pure Data, and tested in an experimental setting.

Three different sonification techniques were tested, and study participants were asked to give their subjective level of relaxation after listening to their brainwave activity being sonified by these techniques.  In addition, alpha-band data was collected and added to the data set.

Please see the related blog posts here and here for much more information about this research.

Audio samples of the three sonification techniques: