Machine Translates Thoughts into Speech in Real Time
Researchers at Boston University have demonstrated a prototype system that wirelessly transmits neural signals from an implanted electrode to a speech synthesizer with a latency of only 50 milliseconds. The electrodes were implanted into a locked-in patient 5 years ago and after 5 months the neurites had grown onto the electrode so that signal patterns could be detected. The volunteer was only able to produce three vowel sounds because only a single three-wire electrode was used, but he was able to reproduce those vowel sounds with up to 89% accuracy. Future implants would access 10 times as many neurons from multiple sites in the ventral premotor cortex where intended speech patterns are believed to originate.