Evaluation of tooth-touch sound and expiration based mouse device for disabled persons

This paper presents an evaluation of a mouse interface device using tooth-touch sound and expiration signals, which we developed as a pointing device for disabled persons. Our device enabled disabled persons to operate a personal computer easily using a mouse driven by their tooth-touch and expiration. It also had superior features, being easy to handle, light weight, user-friendly and inexpensive to make. The performance of our device was evaluated using Fitts´ law, which estimated the comparative usability of the pointing device against that of a conventional ball-type mouse. Finally, we designed a rounding-type menu to improve the input efficiency of the device and apply it in a TV controller. We then compared the input velocity of our device against that of a conventional mouse.