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

Rein Oravox (Double-Microphone) Carbon Hearing Aid

The Rein Oravox (Double-Microphone) carbon hearing aid was manufactured by the F. C. Rein Company located at 108 Strand Street, London, England, probably around 1941. (Rein had just purchased the Oravox Co. in 1940).

The leather case measured 5 9/16" x 2 15/16" x 2 3/16" (14 x 7.5 x 5.7 cm) and weighed 8.8 oz. (250 g) without the battery.

Note that originally "Rein" was pronounced like "Rhine" in the Rhine river. However, during the Second World War, they thought the name was too German-sounding, so they began pronouncing it like the English word "rain".

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The Rein Oravox (Double-Microphone) carbon hearing aid consisted of a double microphone (top), earphone (bottom), volume control/on-off switch (right) and battery plug (left).

 

 

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View of the front of the double microphones of the Rein Oravox (Double-Microphone) carbon hearing aid. These microphones used carbon balls (shot)—you can hear them "rattle" when you shake them.

Each microphone measured 2⅛" in diameter by ¾" thick (5.4 x 1.9 cm).

 

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Rear view of the Rein Oravox (Double-Microphone) carbon hearing aid  showing the pocket clip on the left microphone. At the extreme left end of the pocket clip is a slot for threading a lanyard through so you could hang it around your neck if you preferred.


 

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Close-up view of the back of the right microphone (above picture) showing the name "Rein Oravox" (bottom left), and where it was made "London" (bottom right).

At the bottom between the two screw heads is stamped "British made" and below that "PATENT".

 

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Front view of the Rein Oravox (Double-Microphone) carbon hearing aid sliding volume control shown in the "off" position. At the top (in red) is the word "LOUD" and at the bottom (in white) is the word "OFF".

 

 

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Rear view of the Rein Oravox (Double-Microphone) carbon hearing aid volume control showing the words "F C Rein & Son" and below that "British Made" stamped into it.

 

 

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Close-up view of the battery plug of the Rein Oravox (Double-Microphone) carbon hearing aid. Note that the prongs of the plug are of different sizes so you couldn't plug it in "backwards".

This hearing aid probably used a 3 or 4½ volt battery. The Museum does not have a battery with this exact pin spacing so the size and shape of the battery is unknown.

 

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Front view of the earphone of the Rein Oravox (Double-Microphone) carbon hearing aid. The earphone measured 2" in diameter by ¾" thick (5.1 x 2.0 cm).

 

 

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Rear view of the earphone of the Rein Oravox (Double-Microphone) carbon hearing aid.

 

 

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Side view of the earphone of the Rein Oravox (Double-Microphone) carbon hearing aid showing the holes (center) (there was one on each side) into which the headband brackets snapped.

The headband is missing.

 

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Front view of the leather carrying case the Rein Oravox (Double-Microphone) carbon hearing aid came in. You could use this hearing aid with the microphones in the case as shown, or you could take all the contents out and dispense with the case—your choice.

 

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Insdie view of the leather carrying case of the Rein Oravox (Double-Microphone) carbon hearing aid showing all the components in place.

 

 

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Rear view of the leather carrying case of the Rein Oravox (Double-Microphone) carbon hearing aid showing how the flap was kept closed by the brass latch.

 

 


 

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