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.

 

Body Type Transistor Hearing Aids

Audium Model T9 Transistor (Body) Hearing Aid

This Audium Model T9 3-transistor hearing aid was made in Holland in 1955.

The Model T9 measured 2⅝" x 1¾" x ¾" and weighed 4½ oz without the battery. It has a chrome front and back with black plastic sides/top/bottom.

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Top view of the Audium Model T9 showing the on-off switch with integrated two-position tone (?) switch (top left), and the volume control (top right). (The numbers on the volume control go from 0 to 5.) The rectangular microphone grill is at the front.

 

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The right side of the Audium Model T9 showing the round earphone jack (right center).

 

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The bottom of the Audium Model T9 showing its only identifying marks.

 

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The battery compartment of the Model T9. It probably used an RM-1 mercury battery. A rather unusual feature is that the battery compartment door is spring-loaded.

On the right there are 3 adjusting screws of unknown function.

 


 

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