What does "TDD" or "TTY" stand for?

The term "TDD" or "TTY" stands for "Telecommunication Device for the Deaf." This device serves a crucial role in assisting individuals who are deaf or hard of hearing to communicate over the telephone. It allows users to type out messages that are transmitted over phone lines, making it an essential tool for ensuring accessibility and effective communication for those who cannot rely on auditory methods.

The correct choice highlights the focus of these devices on providing communication access for the deaf community. It emphasizes their role in facilitating telecommunication, specifically tailored for individuals with hearing impairments, thereby fostering inclusion and improving emergency response capabilities.