Fact · Accessibility and health
5minutes of recording time on average
In a 2025 study of EvolveCaptions, a research system, word error rate fell for all deaf and hard of hearing users within one hour of use, with about five minutes of recording time on average.
Checked against its source on October 16, 2026
In the source's own words
“EvolveCaptions reduced Word Error Rate (WER) across all DHH users within one hour of use, using only five minutes of recording time on average.”
EvolveCaptions: Empowering DHH Users Through Real-Time Collaborative Captioning, Liang-Yuan Wu and Dhruv Jain, arXiv (preprint), 2025, Abstract.
Open the original- What it measures
- Hearing participants corrected live recognition errors during conversation, and the system used those corrections to create short recording prompts for the deaf or hard of hearing speaker and to fine-tune the recognizer. The study had 12 deaf and hard of hearing and six hearing participants.
- What it does not show
- A research prototype with a small sample. The abstract does not give the size of the reduction, and it is not a product feature that a user can buy.