Stroke survivor regains voice with brain implant turning intent into real-time speech

A woman who had been unable to form intelligible speech for 20 years after a stroke can now generate spoken sentences again using an implanted electrode array that reads her speech intent from the motor cortex and a software decoder that produces a near-real-time synthetic voice resembling her pre-injury voice. In the BRAVO trial, the system achieved a median latency of about 1.67 seconds from the go cue to the onset of synthesized speech (2.61 seconds on a smaller set), and streamed roughly 46.5 words per minute, improving on earlier eight-second delays. However, results come from a single participant with a unique implantation site; the technology does not read inner thoughts, requires substantial calibration, and remains investigational with questions about generalizability, long-term safety, and home use still unresolved.