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

Zenith "Vocalizer III" Transistor (Body) Hearing Aid

The Zenith "Vocalizer III" transistor hearing aid was manufactured by the Hearing Aid Division of the Zenith Radio Corp. in 1972. It was an 9-transistor aid.

The Zenith "Vocalizer III" measured 2½" x 1¾" x ¾" thick, and weighed 2 oz. with battery. The case had an anodized aluminum front and very light grey plastic back over a black chassis.

The microphone grill is a narrow horizontal rectangle at the top front of the case. The name "ZENITH" is engraved on the lower front panel.

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Top view of the Zenith "Vocalizer III" showing the 1-6 position volume control/on-off switch (top left) and the 3-position "M" (microphone), "MT" (both microphone and t-coil) and "T" (t-coil) switch (top right).

 
 

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The left side of the Zenith "Vocalizer III" showing the 3-pin receiver cord jack (center).

Note, the plug can be put inserted so the cord points up or down. When worn inside a pocket, a person would likely want the cord pointing up.

The "hole" (between the pocket clip and receiver cord jack) is really just an indentation in the plastic.
 

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Rear view of the Zenith "Vocalizer III" hearing aid showing the battery door, which opened from the bottom of the case.

The Zenith "Vocalizer III" took an "N" size 1.4 volt No. 401 mercury battery.

 

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Rear view of the Zenith "Vocalizer III" hearing aid. On the upper back in raised letters are the words "VOCALIZER III".

 

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The Zenith "Vocalizer III" hearing aid in its original case.

 

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Top view of the Zenith "Vocalizer III" carrying case.

 

 

 

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