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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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Tactile Icon(also: Tactile Symbol, 3D Icon, Raised Icon)
A small raised or three-dimensional symbol placed on a tactile map or diagram that represents a real-world object, location, or concept through touch. Tactile icons can be abstract (geometric shapes requiring a legend) or representational (physically resembling the object they…
Talking Lights
Talking Lights is a commercial location-signalling system that modulates ordinary fluorescent light fixtures to transmit an inaudible digital signal, which a hand-held receiver carried by a blind user decodes into spoken information about the current location (for example, a…

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