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.

 

Carbon Hearing Aids: 1900-1939

Deutsche Akustik Model CX "Silber" Carbon Hearing Aid

The Deutsche Akustik Model CX "Silber" carbon hearing aid was made by Deutsche Akustik-Gesellschaft of Berlin, Germany in 1931.

This hearing aid without the battery weighed 2.8 oz (78 g).

It consisted of a carbon microphone, receiver and associated cords. (Some of the parts are missing including the battery case if there was one).

This hearing aid would have used a 3 volt battery.

 

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Front view of the Deutsche Akustik Model CX "Silber" carbon microphone.

The microphone measured 2˝" (6.4 cm) in diameter and 11/16" (1.7 cm) thick.

The microphone grill was quite elegant consisting of 9 curved slots radiating out from a central hole sort of like the petals of a sunflower, and a hole between each slot.


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Rear view of the Deutsche Akustik Model CX "Silber" carbon microphone showing the 5-step volume control shown in the softest position.

 


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Close-up of the Deutsche Akustik Model CX "Silber" carbon hearing aid microphone showing the name and model—Akustik Silber Type CX engraved in the lower half of the microphone.

 


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Side view of the Deutsche Akustik Model CX "Silber" microphone showing the two jacks into which the battery posts plugged.

 


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View of the Deutsche Akustik Model CX "Silber" carbon hearing aid showing one of the battery posts.

 


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Side view of the Deutsche Akustik Model CX "Silber" carbon hearing aid earphone.
 

 


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Rear view of the Deutsche Akustik Model CX "Silber" carbon hearing aid earphone showing the on-off switch labeled "E" (einschalten or on) and  "A" (ausschalten or off). The switch is in the off position.

Note the head engraved in the bottom of the earphone.


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This hearing aid came to the museum with 2 other earphones—but I don't think they are original to this hearing aid. This is the side view of the second earphone.

 


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Rear view of the second earphone.

 

 


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Side view of the third earphone. The ear tip is missing.

 


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Rear view of the third earphone.

 

 

 


 

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