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Vocal Joystick for Computer Interaction

October 9th, 2007 Medgadget Editors Rehab

Researchers at the University of Washington developed a simple, intuitive piece of software for controlling computer applications using nothing but voice. Using vocal control of the mouse, a person is able to interact with browsers and other programs with little to no training.

Vocal Joystick detects sounds 100 times a second and instantaneously turns that sound into movement on the screen. Different vowel sounds dictate the direction: “ah,” “ee,” “aw” and “oo” and other sounds move the cursor one of eight directions. Users can transition smoothly from one vowel to another, and louder sounds make the cursor move faster. The sounds “k” and “ch” simulate clicking and releasing the mouse buttons.
Versions of Vocal Joystick exist for browsing the Web, drawing on a screen, controlling a cursor and playing a video game. A version also exists for operating a robotic arm, and Bilmes believes the technology could be used to control an electronic wheelchair.
Existing substitutes for the handheld mouse include eye trackers, sip-and-puff devices and head-tracking systems. Each technology has drawbacks. Eye-tracking devices are expensive and require that the eye simultaneously take in information and control the cursor, which can cause confusion. Sip-and-puff joysticks held in the mouth must be spit out if the user wants to speak, and can be tiring. Head-tracking devices require neck movement and expensive hardware.
Vocal Joystick requires only a microphone, a computer with a standard sound card and a user who can produce vocal sounds.
“A lot of people ask: ‘Why don’t you just use speech recognition?'” Bilmes said. “It would be very slow to move a cursor using discrete commands like ‘move right’ or ‘go faster.’ The voice, however, is able to do continuous commands quickly and easily.” Early tests suggest that an experienced user of Vocal Joystick would have as much control as someone using a handheld device.

More, with videos of the software in operation, from the University of Washington…
Even more videos of playing games and other applications here…

Medgadget Editors

Medical technologies transform the world! Join us and see the progress in real time. At Medgadget, we report the latest technology news, interview leaders in the field, and file dispatches from medical events around the world since 2004.

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