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First Electric Hearing Aid (1 Jan 1898 Jahr – 1 Dez 1898 Jahr)

Beschreibung:

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.

Zugefügt zum Band der Zeit:

A Brief History of the Hearing Aid

ByBrenda Perez
28 Okt 2019
0
0
201

Datum:

1 Jan 1898 Jahr
1 Dez 1898 Jahr
~ 11 months

Abbildungen:

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