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

Ardente "3" (Single) Carbon Hearing Aid

The Ardente "3" (single) carbon hearing aid was manufactured by Ardente Acoustic Laboratories, Ltd. of London, England around 1943.

Mr. R. H. Dent, the founder, used his name prominently on many of his hearing aids along with the Ardente trade name. It seems the name "Ardente" was made up of his first initial "R" but pronounced as though it were spelled "AR", his last name "Dent" and then a "fancy" "E" on the end.

These carbon hearing aids did not have any model numbers, and since there isn't much documentation available, I have numbered four somewhat similar models as "1", "2", "3" and "4" to differentiate them.
 

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Front view of the Ardente "3" carbon microphone. It used carbon shot. (When you shake it, you can hear the shot rattle.)

The two pins on the battery case pushed into the two jacks on the bottom of the microphone case.

The microphone was 2½" in diameter and ⅝" thick (6.4 x 1.7 cm).

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Rear view of the Ardente "3" carbon microphone.

The 5-position volume control went from soft (left) to loud (right).

The slot  at the top was to thread a lanyard through so you could wear this hearing aid around your neck.
 

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Bottom view of the Ardente "3" carbon microphone showing how the two pins of the battery compartment fitted into the female sockets on the microphone.


 

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Ardente used this rather interesting plug configuration—one pin and one jack on each plug. This plug joined the earphone or receiver cord to the microphone.


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Front view of the Ardente "3" carbon hearing aid earphone. The earphone measured 2⅛" in diameter x 11/16" thick (5.4 x 1.8 cm). It was unusually heavy, weighing in at a hefty 3.5 oz. (100 g).

 


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View of the Ardente "3" carbon hearing aid earphone with headband attached. The headband "pins" snapped into the two small holes on each side of the earphone.

 


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For storage, the headband of the Ardente "3" carbon hearing aid unsnapped from the ear phone and folded in half.

 


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Rear view of the Ardente "3" carbon hearing aid earphone showing the on/off switch (top center) in the off position. On is up and off is down.

 


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The Ardente "3" carbon hearing aid also came with a more discrete receiver and wire ear hook to help hold it in place.


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Rear view of the Ardente "3" carbon hearing aid receiver showing the on/off switch (center). "On" was up and "off" down.


 


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Front view of the Ardente "3" carbon hearing aid earphone showing the ear tip removed. Early receivers came with stock ear tips. The ear tip screwed to a post on the receiver so it could easily be replaced with one of a different size.
 


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Top view of the Ardente "3" carbon hearing aid receiver stock ear tips showing three different sizes.

 


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Front view of the Ardente "3" carbon hearing aid receiver stock ear tips showing three different sizes. Note the different bore sizes too.

 


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The bottom of the Ardente "3" carbon hearing aid battery case opened to show the battery compartment. This hearing aid used a 3 volt Ardente No. 77 battery.

 


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Inside view of the battery compartment of the Ardente "3" carbon hearing aid battery case showing the brass clip contacts. This hearing aid used a battery with matching flat brass spring clips.

 


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The Ardente "3" carbon hearing aid in its storage case.

 

 

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Close-up of the name and address on the inside of the lid of the Ardente "3" carbon hearing aid storage case. It reads, "Mr. R. H. Dents Ardente for Deafness  309 Oxford St  London W. 1."
 

 

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The carrying/storage case for the Ardente "3" carbon hearing aid. The case measured 10⅜" x 3¼" x 2" deep (26.3 x 8.0 x 5.1 cm).

 

 

 

 

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