A brain-computer interface translates neural signals of a woman who is unable to speak, not only into text on a screen but into audible speech using a digital avatar.
Their new work demonstrates something much more ambitious: decoding brain signals into the richness of speech along with the movements that animate a person's face during conversation.
The electrodes intercept brain signals that, if not for the stroke, would have gone to muscles in her tongue, jaw and larynx, and face. A cable, plugged into a port fixed to her head, connected the electrodes to a bank of computers. "This device reads the blueprint of instructions the brain is using to give to the muscles in the vocal tract," Chang says.
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