ang2pang asked
I think it'de be too faulty. Your tongue would have to be at complete rest unless you want to move. It’s a new wheelchair that’s hands-free. Users control it with their tongues. When they move their tongue, it changes the air pressure in their ears. 'We use the ear as an output device and place a small microphone within the ear, basically like a reverse hearing aid,' said Jim West of manufacturer Think-A-Move. When a patient moves her tongue to the right, the tiny microphone recognizes a pressure change and emits a low frequency signal that humans can't hear. The signal is picked up by a special chip in the wheelchair which interprets that signal as a command to move right.
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