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History of hearing aids.
è stato aggiornato 20 apr 2023
A brief evolution of the hearing aids.
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Nella Riju
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Peterborough Town Library
By
Nella Riju
25 mar 2023
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Eventi
1600-the 1900s: The Trumpet Hearing Aid Age
1900-the 1920s: The Telephone Age
1920-40s: The Vacuum Tube Age
The 1950s-80s: The Transistor Hearing Aid Age
The 1980-the 2000s: The Digital Hearing Aid Age
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