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Brain-Computer Interfaces for Speech Communication
Jonathan S Brumberg1, Alfonso Nieto-Castanon, Philip R Kennedy
1Department of Cognitive and Neural Systems, Boston University, 677 Beacon Street, Boston, MA, 02215, Telephone: (617) 353- 9481, Fax Number: (617) 353-7755.
Speech Communication
|March 6, 2010
Summary
A novel brain-computer interface (BCI) decodes intended speech directly from brain activity, offering faster silent communication for paralyzed individuals. This intracortical microelectrode approach shows promise for a speech prosthesis.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Speech Communication
Background:
- Current silent speech methods (EMG, EEG) are slow and require constant attention.
- Electromyography (EMG) is ineffective for individuals with severe paralysis like tetraplegia.
- Existing brain-computer interfaces (BCIs) for communication are limited in speed and usability.
Purpose of the Study:
- To develop a faster silent speech communication method for individuals with severe paralysis.
- To investigate the efficacy of an intracortical microelectrode BCI for predicting intended speech.
- To assess the long-term viability of neural recording for a speech prosthesis.
Main Methods:
- Utilized an intracortical microelectrode brain-computer interface (BCI) to record neural activity from speech production areas.
- Employed neural decoding techniques to predict intended speech information from neuronal signals.
- Synthesized predicted speech with real-time acoustic feedback (delay < 50 ms).
- Demonstrated the long-term recording capability (>4 years) of the Neurotrophic Electrode.
Main Results:
- The BCI successfully predicted intended speech information directly from neural activity.
- Acoustic feedback facilitated improved user control over an artificial speech synthesizer.
- User demonstrated enhanced control within and across recording sessions.
- The Neurotrophic Electrode provided stable, useful neural recordings over an extended period.
Conclusions:
- An intracortical microelectrode BCI is a viable approach for rapid silent speech communication.
- This technology holds significant potential as a speech prosthesis for severely paralyzed individuals.
- The system enables faster communication rates compared to existing assistive technologies.
