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

Maico Model AC Transistor (Body) Hearing Aid

The Maico Model AC was manufactured by Maico Electronics, Inc. of Minneapolis, MN in 1957.  The name "Maico" was derived from the initials of the Medical Acoustic Instrument Company.

The Model AC was a 5-transistor hearing aid with a T-coil. It had a cream plastic case with a band of stainless steel trim. It measured 2⅝" x 2" x⅝" thick.

The cord and receiver (earpiece) are shown to the right. An ear mold (not shown) needs to be snapped to the receiver.

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Top view of the Model AC showing the volume control (left), microphone grill (center) and T-coil switch (right). (The 3-position switch (labeled "T" (t-coil), "M" (microphone) and "V" (voice?) is shown in the "V" position.) The jack (2 holes) above the T-coil switch are where you plugged in the receiver (earpiece) cord.

Notice that the microphone was located on the top, not on the front as was more commonly done with body aids.

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The Maico Model AC used two 1.4 volt Number 401 mercury batteries.

Note that the Model AC-1 (not shown) only used 1 battery.



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