Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Vacuum Tube Hearing Aids: 1921-1953

Acousticon Model A-55 "Symphonic" Vacuum Tube Hearing Aid

The Acousticon A-55 "Symphonic" was a two-piece vacuum tube hearing aid manufactured by Dictograph Products, Inc. of New York between 1942 and 1945.

In 1945 it was modified and became known as the "Super-Power".

The overall dimensions of the aid, which came in black or clear plastic, was 4" by 2¼" by 7/8". In the Unipac model (see below) the leather case increased the size to 5½" by 2½" by 1".

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Close-up showing the Acousticon A-55 with the black case. This model is the two-piece, pre 1945 model with a black case.


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The pre-1945 Acousticon A-55 was a two piece unit as the batteries were separate. The picture at the right shows the two battery plugs—the smaller 2-prong plug for the "A" battery and the larger 3-prong plug for the "B" battery.

 

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Close-up of the rear of the Acousticon A-55 (1945 "Unipac" model) showing its clear plastic case so you could see all the components. The plastic front was frosted so you couldn't see into it from the front.

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In 1945 they came out with the "Unipac" model that kept the batteries in a leather case with the hearing aid. The picture at the right shows this new battery holder. The Eveready 504 15-volt "B" battery mounted horizontally in the top holder and the larger "C"-sized 1½ volt "A" battery in the bottom mount.

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The Acousticon A-55 "Unipac" showing the hearing aid (center), ear piece (top) and battery holder (bottom).

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The 1945 "Unipac" showing the optional "genuine morocco" leather case. The case contained both the batteries and the hearing aid making this a one-piece hearing aid.

 

 

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