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

Stolz Electrophone Carbon Hearing Aid

The Stolz Electrophone carbon hearing aid was manufactured by the Stolz Electrophone Co of Chicago, IL beginning in 1909.

The complete hearing aid including  battery weighed 12.4 oz.

Included with this carbon hearing aid were some instructions on how to use it. There were two notices and detailed instructions on how to use it.

These instructions also show how to use the sound magnifier (missing) on the microphone to better capture sounds.

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Front view of the Stoltz Electrophone microphone. The inscription around the mic reads "The Stoltz Electrophone" and "Chicago, U. S. A."

This hearing aid had no volume control.

Note that carbon microphones did not work when laying down. You had to keep the vertical.

 

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Rear view of the back of the Stolz Electrophone carbon microphone. The microphone is 2½" in diameter and 13/16" thick.

 


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Front view of the Stolz Electrophone earphone. The earphone measured 2⅛" in diameter and ¾" thick.

 

 

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Side view of the Stolz Electrophone showing the on-off switch.

Note the hole near the bottom right side. There is a corresponding hole on the other side. The headband (missing) snapped into these holes.

 

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Rear view of the Stolz Electrophone earphone.

 

 

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The Stolz Electrophone carbon hearing aid had a uncommon way of attaching the microphone wires to the battery terminals. There were two sized holes in the pins so you couldn't put them on the wrong terminals.

 

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The 3-volt carbon-zinc battery used by the Stoltz Electrophone carbon hearing aid. There is no name on the battery to identify the manufacturer.


 

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The Stolz Electrophone in its carrying case.

 

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Instructions on the inside of the lid of the Stolz Electrophone carrying case.

Read the pdf version here if the print is too small in the pictures.

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Top view of the center of the Stolz Electrophone carrying case showing the model and manufacturer.
 

 

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The carrying case for the  Stoltz Electrophone carbon hearing aid. The carrying case measures 7⅝" wide x 3 5/16" deep x 3⅜" high.


 


 

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