'For the first time, this study demonstrates that we can generate entire spoken sentences based on an individual's brain activity,' said study co-author Dr. Edward Chang.
Scientists have developed a device that uses a person’s brain activity to power a virtual mouth, which could one day help people who have lost the ability to speak.
Chang, a professor of neurological surgery and a member of the University of California, San Francisco Weill Institute for Neuroscience, continued:"This is an exhilarating proof of principle that with technology that is already within reach, we should be able to build a device that is clinically viable in patients with speech loss."
To test whether the speech created by the vocal tract could be easily understood, the researchers played it to 1,755 listeners across 16 intelligibility tasks, including transcribing what they heard. "We reasoned that if these speech centers in the brain are encoding movements rather than sounds, we should try to do the same in decoding those signals."
Next, the scientists want to design a system that can be used by a person who can’t speak, and therefore won’t be able to train the virtual voice.
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