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

Paravox Model D Vacuum Tube Hearing Aid

The Paravox Hearing Aid Company of Cleveland, Ohio manufactured the Paravox Model D (Top Twin Tone) vacuum tube hearing aid in 1950.

It was one of a range of Paravox hearing aids of the time that had a very attractive brushed aluminum case. The volume control wheel was on the left side. A pocket clip was located on the rear face.

The Model D measured 2⅞” by 1¾” by ¾” and weighed 4 oz. with batteries.

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Back

 

On the Model D, the gold filigree microphone opening on the front was closed off. Instead it had twin microphone openings on the top edge. (The gold knob in the center is actually the top of the pocket clip.)


 

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An unusual feature of the Paravox D is that the battery compartment cover slid off, rather than the usual hinged cover. Here it is shown half-opened. You can also see the gold-colored pocket clip at he top left.

 

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The Paravox D used a 22½ volt 505E "B" battery (middle) and a 1.4 volt RM-1 mercury "A" battery (bottom left).

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The Paravox Model D in its original case.

 

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The outside of the the original case for the Paravox Model D.

 

 

 

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