Tactile and bone-conduction auditory brain computer interface for vision and hearing impaired users — Stimulus pattern and BCI accuracy improvement

This paper aims to improve tactile and bone-conduction brain computer interface (tbaBCI) classification accuracy based on a new stimulus pattern search in order to trigger more separable P300 responses. We propose and investigate three approaches to stimulus spatial and frequency content modification. As result of the online tbaBCI classification accuracy tests with six subjects we conclude that frequency modification in the previously reported single vibrotactile exciter-based patterns leads to border of significance statistical improvements.