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.

Vacuum Tube Hearing Aids: 1921-1953

Multitone VPM Vacuum Tube Hearing Aid

The Multitone VPM (Vest Pocket Model) was manufactured by the Multitone Electric Co. Ltd. of London, England in 1937. It appears to have been their first wearable hearing aid and featured a clip-on external microphone and an earphone. The VPM model was very small for its time measuring 3¼” by 2½” by 1”.

While this example does not have a telecoil, it is reported that the Multitone VPM in 1938 was the first wearable hearing aid to incorporate a telecoil

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A close-up of the earphone.


 

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A close-up of the external microphone.

 

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The Multitone VPM used an external 1½ volt “A” battery (battery plug on the left) and 37½ volt “B” battery (plug on the right) Notice that this "B" battery plug is a three-prong plug.

 


 

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