An auditory brain-computer communication device

The thought-translation-device (TTD) is a brain-computer-interface (BCI) that enables completely paralyzed patients to communicate with their brain signals only. Voluntary self-regulation of brain signals (e.g. the slow cortical potentials) is achieved by a feedback training. Visual impairment of these patients requires an auditory feedback mode. The TTD can be entirely operated by listening and voluntary production of specific mental activity. It provides auditory (sonified) feedback of multiple EEG parameters for the training of self-regulation of brain signals which can operate a verbal spelling interface. The properties of the system are reported and the results of experiments with auditory feedback are presented.