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 "Vocal joystick" software moves a computer cursor in eight directions depending on the vowel sound: "ah, aw, ee, and oo." Detecting sound 100×/sec, different versions allow you to browse the Web, draw, or play video games. Future apps include controlling electronic wheelchairs and robotic arms. A mike, a PC plus a standard sound card, and user vocalization make it work. View a video demo.
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