Glossary

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Non-Contact Haptics(also: Contactless Haptics, Device-Free Haptics)

A class of haptic feedback techniques that render tactile sensations on the user's body without requiring physical contact with a device, surface, or wearable. Common approaches include mid-air ultrasound haptics, air-vortex rings, and laser-induced plasma. Because they avoid…

Non-Speech Audio(also: Non-Verbal Audio, Non-Speech Sound)

Auditory output that conveys information through sounds other than spoken words — for example tones, clicks, earcons, auditory icons, musical motifs, or vowel-like timbres. Non-speech audio is widely used in accessibility because it can be faster and less cognitively demanding…

Non-Visual Drawing(also: Blind Drawing, Drawing Without Sight)

The practice of creating graphical representations — such as diagrams, shapes, charts, or illustrations — without relying on visual feedback. Non-visual drawing can be accomplished through tactile methods (using raised line drawing kits or embossing tools), audio-tactile methods…

Nonvisual Access(also: Non-Visual Access, Nonvisual Web Access, Non-Visual Web Access)

The use of digital content, particularly web pages and applications, through means other than sight. Nonvisual access typically involves screen readers that convert text to speech, braille displays that render content tactilely, or other assistive technologies that present…

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