Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Telecoil(also: T-Coil, Telephone Coil, Induction Coil)
- A small copper coil inside a hearing aid or cochlear implant processor that picks up magnetic signals and converts them to sound. Telecoils allow hearing device users to receive audio directly from telephones, loop systems, and other compatible devices while reducing background…
- Telecommunication equity(also: Communication equity, Functional equivalence)
- The principle that people with disabilities should have access to telecommunications services that are functionally equivalent to those available to people without disabilities. For deaf users, this means video calling capabilities (for sign language) should be treated as…
- Telecommunications Device for the Deaf(also: TDD, TTY, Text Telephone)
- A specialized device that enables text-based telephone communication for people who are deaf or hard of hearing. TDDs transmit typed text over telephone lines using acoustic coupling or direct connection, requiring compatible devices at both ends of the conversation. While TDDs…
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