How TTY Opened Up The Phones For The Hard of Hearing
The teletypewriter (TTY) revolutionized communication for the deaf and hard of hearing by enabling text-based conversations over traditional phone lines starting in the 1960s. Developed by deaf engineers James C. Marsters and Robert Weitbrecht, the TTY used acoustic couplers and frequency-shift keying to transmit messages between compatible devices. To bridge communication with hearing individuals, telecommunications relay services were established, using operators to mediate calls between TTY and standard phone users.
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How TTY Opened Up The Phones For The Hard Of Hearing No comments by: Zoe Skyforest April 30, 2026 Title: Copy Short Link: Copy The telephone was an invention that revolutionized human communication. No more did you have to physically courier a letter from one place to another, or send a telegram, or have a runner carry the message for you. Instead, you could have a direct conversation with another person a great distance away. All well and good if you can speak and hear, of course, but rather useless if you happen to be deaf. Those hard of hearing were not left entirely out of the communication revolution, however.
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