What device is specifically used to communicate with persons with hearing/speech disabilities?

The teletypewriter (TTY) is the device specifically designed for communicating with individuals who have hearing or speech disabilities. TTYs facilitate text-based communication over phone lines, allowing users to type messages that can be transmitted and displayed on a screen, thus enabling those who may not be able to hear or speak to communicate effectively.

This device is particularly important because it converts spoken language into text and can represent speech in a way that individuals with hearing impairments can both send and receive. While computers can also support communication through various applications and programs, the TTY is distinct in its specific design and function tailored to the needs of those with hearing and speech difficulties.

Other options, like television or radio, serve entirely different purposes, such as entertainment or broadcasting information, and do not provide the direct, personal communication pathway that is essential for effective interaction between individuals with and without these disabilities.