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Transitor Age of Hearing Aid (1 Jan 1950 Jahr – 1 Jan 1989 Jahr)

Beschreibung:

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.

Zugefügt zum Band der Zeit:

A Brief History of the Hearing Aid

ByBrenda Perez
28 Okt 2019
0
0
201

Datum:

1 Jan 1950 Jahr
1 Jan 1989 Jahr
~ 39 years

Abbildungen:

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