Scientists implanted electrodes into the brains of volunteers and decoded signals in cerebral speech centres.
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. Stroke, ailments such as cerebral palsy, amyotrophic lateralsclerosis , Parkinson’s disease and multiple sclerosis,brain injuries and cancer sometimes take away a person’s ability to speak.
The researchers discerned the vocal tract movements needed to produce the speech, and created a “virtual vocal tract” for each participant that could be controlled by their brain activity and produce synthesized speech. The researchers were more successful in synthesizing slower speech sounds like “sh” and less successful with abrupt sounds like “b” and “p.”
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