Voiceitt — Speech Recognition for Atypical Speech, Tested With 66 Users Over Three Months or More in the Nuvoic Project

Voiceitt is an app that learns an individual's non-standard speech so that people with dysarthria (for example from cerebral palsy, brain injury, Down's syndrome or stroke) can communicate vocally and access voice-driven technology.
The Nuvoic Project, a three-year partnership led by Voiceitt with the Karten Network managing user involvement, recruited 66 testers (enrolled October 2020–December 2021) with speech affected by conditions such as cerebral palsy, acquired brain injury, Down's syndrome, stroke and hearing impairment. Most also had physical, sensory or cognitive impairments. Testing was user-led: participants identified the use cases most relevant to their daily lives and tested over three months or more. The study was published in 2024 in the journal Assistive Technology.
Reported results: 11 participants (17%) used the app independently after initial setup and training, which shows that many users needed ongoing support. Separately, in a company-announced pilot with Deaf participants, average word error rate was 8% (above 90% accuracy) after training the system with 200 recordings; that figure is company-reported and from a small pilot.
Caveats: the accuracy claims come mainly from the vendor, the peer-reviewed study is a user-involvement study rather than a controlled trial of outcomes, and the product is commercial. Its value for inclusive design is a documented, medium-term co-design process with disabled users.

Read the full analysis: https://www.tandfonline.com/doi/full/10.1080/10400435.2024.2328082