Proto holographic display booths have proved superior to Zoom in capturing subtleties of body language in a trial of their use with American Sign Language at Gallaudet University in the US. Simms said holograms are better for ASL than Zoom because of the 3D nature of the language. In the same way that vocal intonations can change a message, facial expressions are important in ASL. Body language is also necessary to communicate fully; certain words build on other signs, which is easier to see in 3D. She said Gallaudet had previously tried incorporating technology with ASL into its curriculum, but ran into issues with glitches and pixelation that made it difficult to understand ASL.