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Brain Implant Enables Paralyzed Woman to Speak in Real Time

A groundbreaking brain-computer interface converts thoughts into near-instant speech with the user’s own voice, marking a major advance in communication technology for individuals with severe paralysis.

Researchers connect Ann's brain implant to the voice synthesizer computer. (Photo by Noah Berger)
Representational image: This technology offers significant potential to improve the lives of individuals with severe speech paralysis.
digital brain image

Overview

  • Researchers at UC Berkeley and UC San Francisco have developed a brain implant that streams speech in near real time, eliminating delays seen in previous systems.
  • The system was tested on Ann, a 47-year-old stroke survivor who lost her ability to speak 18 years ago, allowing her to communicate fluently using a synthetic version of her pre-injury voice.
  • Artificial intelligence decodes neural signals from the motor cortex into audible speech within one second, enabling naturalistic and fluid communication.
  • The technology demonstrates the ability to generalize to new words not included in its training dataset, showcasing its adaptability and learning capabilities.
  • While promising, the system requires further refinements to improve accuracy, expand vocabulary, and incorporate emotional expressiveness for broader clinical viability.