People robbed of the ability to talk due to a stroke or another medical conditio...
WASHINGTON - People robbed of the ability to talk due to a stroke or another medical condition may soon have real hope of regaining a voice thanks to technology that harnesses brain activity to produce synthesized speech, researchers said on Wednesday.
This speech was mostly intelligible, though somewhat slurred in parts, raising hope among the researchers that with some improvements a clinically viable device could be developed in the coming years for patients with speech loss. Some people use devices that track eye or residual facial muscle movements to laboriously spell out words letter-by-letter, but producing text or synthesized speech this way is slow, typically no more than 10 words per minute. Natural speech is usually 100 to 150 words per minute.
“Very few of us have any real idea, actually, of what’s going on in our mouth when we speak,” said neurosurgeon Edward Chang, senior author of the study published in the journal Nature. “The brain translates those thoughts of what you want to say into movements of the vocal tract, and that’s what we’re trying to decode.”
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