Their virtual computer mouse driven by sound has already been tested at the UW Medical Center with spinal-cord-injury patients and other participants with varying levels of disabilities. The researchers, who developed their own voice-recognition technology, hope to have a prototype available online this fall. But read more...
You can see above "the mapping of the vowel sounds recognized by the Vocal Joystick engine to the radial direction resulting in a mouse pointer movement. The VJ engine also captures loudness and pitch information, which can be used to control the speed of the pointer movement." (Credit: UW) Here is a link to a larger version of this diagram.
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