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First Electric Hearing Aid (1 ene 1898 año – 1 dic 1898 año)

Descripción:

Miller Reese Hutchison creates the first electric hearing aid called the akouphone. It used a carbon transmitter in order to make the device portable. This hearing aid would amplify weak signals into strong signals using electrical currents.

Añadido al timeline:

A Brief History of the Hearing Aid

ByBrenda Perez
28 oct 2019
0
0
201

fecha:

1 ene 1898 año
1 dic 1898 año
~ 11 months

Fotos:

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