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: 1900-1939

Unknown 2 Carbon Hearing Aid

This unknown make of carbon hearing aid was made around 1930, probably by, or for, a British company as it came from the United Kingdom.

The overall height of this hearing aid was 7⅛". The battery compartment itself measured 3¾" x 2⅝" x 1". The whole hearing aid (without the battery) weighed 7½ oz.

 

Click picture for larger view

 

Back

 
Front view of the carbon microphone showing the design of the microphone grill.

The microphone measured 2½" in diameter and ⅝" thick.


Click picture for larger view

 
Rear view of the carbon microphone showing the 6-position volume control number 1 through 6. It is shown in the "1" position.

The ring at the top is for threading a ribbon through to make a lanyard for wearing it around the person's neck.


Click picture for larger view

 
Front view of the on-off switch. It is labeled "on" (left) and "off" (right). This switch is about 1/3 of the way along the cord joining the microphone to the ear piece (receiver). This switch is ⅞" in diameter.


Click picture for larger view

 
The receiver had a wire ear hook to hold it in place. The stock ear mold could screw out to replace it with one of a different size.


Click picture for larger view

 
Close-up view of the receiver showing the volume adjustment that could be made by turning the two halves of the receiver up to about ½" (lower center).


Click picture for larger view

 
Bottom view of the battery container. The clip (top) holds the bottom from swinging down.


Click picture for larger view

 

The battery compartment showing the battery door swung down.

This hearing aid took a 4.5 volt battery that had flat brass springs on the top to engage the corresponding brass springs in the top of the battery compartment. This was common with British-made carbon hearing aids of this era. The Ardente Hearing Aid Battery shows these springs. This battery fits this hearing aid.


 

Click picture for larger view

 

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