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. |  | Click picture for larger view | | |   | | | |
| 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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