Stephen Hawking may lose famous voice, facial muscles deteriorate
January 06, 2012  11:43

Professor Stephen Hawking may lose his distinctive computerised voice as deteriorating facial muscles have slowed down his ability to speak to one word per minute, according to aides.  

The world's most famous physicist uses technology operated by twitching his cheek to painstakingly write words on a computer.  

A tiny infrared sensor on his glasses detects his cheek pulses, and then selects words displayed on a linked-up computer screen. The chosen words are then spoken by a voice synthesiser.  

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