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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Voice Activity Detection(also: VAD, Speech Detection)
A signal processing technique that automatically determines whether a segment of audio contains human speech or not. In accessibility applications, voice activity detection is used in audio description timing systems to identify non-speech segments where descriptions can be…
Voice Interface(also: Speech Interface, Voice User Interface, VUI)
An interface that allows users to interact with a system using spoken natural language commands rather than keyboard, mouse, or touch input. Voice interfaces range from simple command-and-control systems that recognise fixed phrases to conversational assistants that interpret…

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