Development of the TTY – Part I

 In the mid 1970s, as a young audiologist working in a university aural rehabilitation clinic, I inherited an old TTY.  ‘Old’, at the time, was 1960s technology that cost between $650 and $1000, making it a luxury item that very few deaf individuals could afford.  Each person who was communicating required their own TTY so it was definitely an expensive device.  Additionally, the TTY was…

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The Road to the Vacuum Tube Hearing Aid

As we saw last week at Hearing international, the road to a working portable electric hearing instrument involved a series of inventions such as the telephone and the carbon microphone before Miller Reese Hutchinson put the parts together and presented the world with a working electronic hearing device.  Recall that the carbon microphone was invented in 1878 and by 1896…

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