Control of Electric Wheelchair by Brain‐Computer Interface Using Mixed Reality and Virtual Sound Source

A brain‐computer interface for operating an electric wheelchair (wheelchair BCI) has been studied to support independent living for physically disabled patients. The current wheelchair BCI systems are facing the problem that the wheelchair cannot be moved or rotated to an arbitrary place or direction in a single measurement. To solve this problem, we developed a BCI that uses audiovisual stimuli based on mixed‐reality (MR) and virtual sound sources. During the online analysis, six out of seven participants were able to move or rotate the wheelchair to the target location or direction at a rate higher than the chance level. Thus, our results indicate that audiovisual stimulation with MR and virtual sound sources may be useful for intuitive wheelchair operation.