Glossary

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Non-Verbal Vocal Interface(also: NVVI, Non-Verbal Vocal Interaction)

An interaction method that uses non-speech vocal sounds — such as humming, hummed melodies, rhythmic patterns, or vowel sounds — to control a computer or communication device. Unlike speech recognition, which requires the user to produce intelligible words, non-verbal vocal…

Non-Verbal Vocalization(also: Non-Speech Vocalization, Vocal Gesture, Non-speech Vocalisation)

A sound produced by the voice that is not a spoken word, such as a sustained vowel sound ("Ahhhhh"), hum, or other vocal noise. In assistive technology and alternative input contexts, non-verbal vocalizations can serve as continuous control signals for cursor movement or other…

Nontraditional Assistive Technologies(also: NTATs, Nontraditional Input Technologies)

Input technologies that use physiological signals rather than physical movement to control computers, providing access for people who cannot use traditional devices like keyboards, mice, or even eye-tracking systems. NTATs include brain-computer interfaces (using EEG or fNIR),…

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