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Transitor Age of Hearing Aid (1 ene 1950 año – 1 ene 1989 año)

Descripción:

Bell Telephone Labratories invented new technology for hearing aid. Now they had gotten very good in comparison to other hearing aids. This hearing aid was now more comfortable and less of a hassle for users to have. Fit more discreetly behind the ear.

Añadido al timeline:

A Brief History of the Hearing Aid

ByBrenda Perez
28 oct 2019
0
0
201

fecha:

1 ene 1950 año
1 ene 1989 año
~ 39 years

Fotos:

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