First they babble, experimenting with the basic units of the language (sounds in the case of spoken language and handshapes, movements, and locations in the case of sign).

A research team has developed an artificial intelligence-powered ring equipped with micro-sonar technology that can continuously and in real time track finger-spelling in American Sign Language (ASL).

The current class of NYPD recruits — 600 strong — learned basic American Sign Language as part of their training, enabling them to better communicate with deaf people during emergencies.