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!

Home Enter the Museum About Us Contact Us

FREE Subscription to:
Hearing Loss Help
The premier e-zine for people with hearing loss

Your email address
will never be
rented, traded or sold!

Your First Name:
Your E-mail:
Search this site:

 Results per
 page

 all words
 any words


Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Carbon Hearing Aids: 1931-1940

Gem Model 44 Carbon Hearing Aid

The Gem Model 44 carbon hearing aid was manufactured by The Gem Ear Phone Co. of New York, NY sometime around 1935.

The microphone was 2⅝" in diameter and 1" thick.

The case measured 7˝" by 3" by 2⅞" high. The whole unit, including case and battery weighed 1 lb, 6 oz.

Click picture for larger view

 

Back

 
Front view of the microphone of the Gem Model 44 carbon hearing aid. The microphone grill was in the shape of a 6-pointed star.


 

Click picture for larger view

 
Rear view of the microphone of the Gem Model 44 carbon hearing aid showing the volume control (black thumb wheel in center). Notice the circle cut out at the 1 o'clock position showing the volume level (1 in this case). Volume ranged from 1 to 9.

To the right of the volume control is a hole for threading a cord through so you could hang the microphone around your neck if so desired.
 

Click picture for larger view

 
Side view of the microphone showing the raised black volume control wheel. It had a serrated edge for ease of turning.


 

Click picture for larger view

 
The Gem Model 44 carbon hearing aid microphone and battery cable plug. The pins are of slightly different size. This difference in pin sizes ensured the correct polarity.


 

Click picture for larger view

 
One the other "end" of the Gem Model 44 carbon hearing aid microphone there was the earphone cord jack and plug. The difference in pin sizes ensured the correct polarity.


 

Click picture for larger view

 
Front view of the earphone for the Gem Model 44 carbon hearing aid.

The earphone measured 2" in diameter by 9/16" thick.

The earphone was held in place by a headband (missing).
 

 

Click picture for larger view

 
Rear view of the Gem Model 44 carbon hearing aid earphone showing the on-off switch (top) and model number (bottom).


 

Click picture for larger view

 
This hearing aid used a Gem 1A 3-volt battery (right). The battery cable plug (left) is shown beside the matching terminals on the battery.


 

Click picture for larger view

 
The Gem Model 44 carbon hearing aid in its carrying case.


 

Click picture for larger view

 

Inside the lid of the carrying case it reads "The Gem Earphone Co., New York".

 

Click picture for larger view

 

The front of the carrying case showing the the opening for the microphone grill. This hearing aid could be used as a table-top model with the microphone mounted in the case as shown, or worn on the body and just using the case for storing and carrying it.

The case was finished in black leatherette.

 

Click picture for larger view

 
The back of the carrying case showing the snap fastener to hold the case closed.

 


 

Click picture for larger view

 

(If a larger picture doesn't appear, you may have to turn your pop-up blocker off)