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

Acousticon Model JR Carbon Hearing Aid

 The Acousticon model JR was a single microphone carbon hearing aid manufactured in 1923 by Dictograph Products, Inc. of  New York, NY.

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Front view of the Acousticon Model JR showing the single carbon microphone.

This carbon shot microphone measured 2⅝" in diameter by ¾" thick. It weighed 2.6 oz.

 

 

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Front view of the Acousticon Model JR showing the single carbon microphone adorned with a brooch for fastening it you a dress or blouse. Some lady had added this, as it was not standard equipment.

 

 

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Rear of the Acousticon Model JR carbon microphone showing how the brooch was fastened around the pocket clip (top center).

 

 

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Close-up of the rear of the Acousticon Model JR carbon microphone showing the model number (JR) at the top right. The serial number (1180) is visible at the extreme right.

 

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Close-up of the bottom front of the Acousticon Model JR carbon microphone showing the on-off switch/volume control. The person twisted the volume control to increase or decrease the volume. The numbers indicated the relative volume and ranged from 0 (off) to 10 (loud).

 

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Top view of the Acousticon Model JR carbon amplifier showing the Acousticon name.

This amplifier measured 1⅜" wide by ¾" high by 11/16" deep. It  was very light—weighing only 0.4 oz.

 

 

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Side view of the carbon amplifier of the Acousticon Model JR showing the microphone (left) and earphone (right) plugs.

The plugs on the bottom plugged directly into the jacks on the top of the battery. Note that the plugs are of different sizes to preserve correct polarity.

The Acousticon Model JR used a 4½ volt carbon-zinc battery such as the Model EP-129 General battery.
 

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To make it easy to plug things in correctly, you simply matched the dots. One dot matched the earphone jack and plug.

 

 

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Two dots matched the microphone jack and plug.

 

 

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Close-up view of the microphone plug and jack. Note the microphone connectors of the Acousticon Model JR had three pins.

 

 

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Close-up view of the earphone plug and jack. Note the earphone connectors of the Acousticon Model JR had two pins.

 

 

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Close-up of the receiver and stock ear mold of the Acousticon Model JR. The red rubber? on the top of the earmold was to make the tip a bit bigger to give it a better fit in order to prevent feedback.

 

 

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The receiver (left) and earmold (right) of the Acousticon Model JR shown snapped apart.

 

 

 


 

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