Novel Virtual Moving Sound-based Spatial Auditory Brain-Computer Interface Paradigm
This work addresses usability and engagement issues in auditory BCIs for users, though it is incremental as it builds on existing P300 oddball paradigms.
The paper tackled the problem of boring and hard-to-perceive static auditory stimuli in brain-computer interfaces by developing a virtual moving sound-based paradigm, resulting in similar classification accuracy to static methods but with improved subject comfort and discrimination ease in a study of seven healthy subjects.
This paper reports on a study in which a novel virtual moving sound-based spatial auditory brain-computer interface (BCI) paradigm is developed. Classic auditory BCIs rely on spatially static stimuli, which are often boring and difficult to perceive when subjects have non-uniform spatial hearing perception characteristics. The concept of moving sound proposed and tested in the paper allows for the creation of a P300 oddball paradigm of necessary target and non-target auditory stimuli, which are more interesting and easier to distinguish. We present a report of our study of seven healthy subjects, which proves the concept of moving sound stimuli usability for a novel BCI. We compare online BCI classification results in static and moving sound paradigms yielding similar accuracy results. The subject preference reports suggest that the proposed moving sound protocol is more comfortable and easier to discriminate with the online BCI.