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 "Royal M" Transistor (Body) Hearing Aid

The Zenith "Royal M" transistor hearing aid was manufactured by the Hearing Aid Division of the Zenith Radio Corp. beginning in May, 1954. It used 3 transistors.

Its gold anodized aluminum case measured 2⅝" x 1¾" x ⅝" thick, and weighed a total of 3 oz. with battery.

The microphone grill was a black vertical rectangle with the Zenith crest in the middle of it (upper front center).

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Top view of the Zenith "Royal M" showing the 4-position tone control (left), the receiver cord jack (center) and the 1-7 volume control/on-off switch (right).

The tone control was labeled "M" (mid), "L" (low), "F" (full), "H" (high).

Here is a copy of the User's Manual for the Zenith Royal M hearing aid.
 

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Rear view of the Zenith "Royal M" showing how the battery door swings up revealing the battery compartment (bottom). The Zenith "Royal M" took an "N" size 1.4 volt No. 401 mercury battery.

 

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Rear view of the Zenith "Royal M". Engraved into the upper back, on separate lines, are the words, "Zenith", "Royal", "M", "the royalty of hearing".

 

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The Zenith "Royal M" in its original carrying case.

 

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Top view of the Zenith's "Royal M" carrying case.

 

 

 

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