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Transitor Age of Hearing Aid (1 janv. 1950 – 1 janv. 1989)

Description:

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.

Ajouté au bande de temps:

A Brief History of the Hearing Aid

ByBrenda Perez
28 oct. 2019
0
0
201

Date:

1 janv. 1950
1 janv. 1989
~ 39 years

Les images:

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