Communication-assisted technology using a P300-based Brain-ComputerInterface (BCI) by bone-conduction auditory stimulation

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The objective of our multi-disciplinary research is to develop BCI for cognitive P300 ERPs in a bone-conduction (BC) and air-conduction (AC) auditory oddball paradigm. Compared to previous P300-based BCI system using AC auditory oddball paradigm, our study aims at the possibility of using BC auditory oddball paradigm by arbitrary distinction of the tone burst sound stimulation at different frequencies. An off-line BCI system was tested in seven healthy subjects. The optimal condition for deriving the P300 ERPs wave by AC stimulation using standard headsets was com pared with BCstimulation using headsets in contact with both sides of the temporal bone in subjects. Our results show that it is possible to deduce P300 ERPs by the AC and BC auditory stimulations with the potential to utilize it as a command signal in the healthy subjects.