Development of a virtual keyboard system using a bio-signal interface and preliminary usability test

Abstract

People with severe speech or language problems rely on augmentative and alternative communication (AAC) to supplement existing speech or replace speech that is not functional. However, many people with severely motor disabilities are limited to use AAC, because most of AAC use the mechanical input devices. In this paper, to solve the limitations and offer a practical solution to disabled person, a virtual keyboard system using a bio-signal interface is developed. The developed system consists of bio-signal interface, training and feedback program, connecting module and virtual keyboard. In addition, we evaluate how well do subjects control the system. From results of preliminary usability test, the usefulness of the system is verified. © 2013 Springer-Verlag.