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Before the Intel project, Hawking had tested EEG caps that could read his brainwaves and potentially transmit commands to his computer.Somehow, they couldn't get a strong enough brain signal."We're going to be looking carefully at applying some state-of-the-art computing technology to improve Stephen's communicating speed.We hope that this team has a breakthrough and identifies a technique that allows him to communicate at levels he had a few years ago."Hawking had been too ill to attend his own birthday party, so he met the Intel experts some weeks later at his office in the department of applied mathematics and theoretical physics at the University of Cambridge.
"Stephen has always been inspirational to me," says Denman, who also uses a wheelchair.
His graduate assistant at the time then devised a switching device called the "cheek switch." Attached to his glasses, it could detect, via a low infrared beam, when Hawking tensed his cheek muscle.