What is the speech synthesizer used by Stephen Hawking?

Answer

Stephen Hawking permanently lost his voice due to a serious illness. Since then he has used a speech synthesizer to communicate. It works by using a predictive text entry system.
Q&A Related to "What is the speech synthesizer used by Stephen..."
He used to have a sensor under his eye attached to his glasses, and, the movement from his eye would control the mouse and to click he used to just have a remote in his hand for him
http://wiki.answers.com/Q/How_does_Stephen_Hawking...
Here is a Wikipedia extract I think will answer your question: In Hawking's many media appearances, he appears to speak fluently through his synthesizer, but in reality, it is a tedious
http://www.quora.com/How-does-Stephen-Hawkings-voi...
His eye moves a thing on the screen which he uses to pick out a letter at a time. When you see him interviewed on tv it is usually edited because it actually takes ages for him to
http://answers.yahoo.com/question/index?qid=200901...
Stephen Hawking's computer system works via an infra-red 'blink switch' clipped onto his glasses. By scrunching his right cheek up, he is able to talk.
http://www.kgbanswers.co.uk/how-does-stephen-hawki...
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