Fact · Voice and AI
78words per minute
A second brain-computer interface study decoded attempted silent speech into text at a median of 78 words per minute with a median word error rate of 25 percent.
Checked against its source on October 16, 2026
In the source's own words
“we demonstrate accurate and rapid large-vocabulary decoding with a median rate of 78 words per minute and median word error rate of 25%”
A high-performance neuroprosthesis for speech decoding and avatar control, Sean L. Metzger et al., Nature, 2023, Abstract.
Open the original (DOI 10.1038/s41586-023-06443-4)- What it measures
- The participant attempted to silently speak sentences while an electrode array on the brain surface recorded signals.
- What it does not show
- One participant, a research device and a 25 percent word error rate.