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.

 

Transistor Hearing Aids

Sonotone Model 333 Behind-the-Ear (BTE) Transistor Hearing Aid

The Sonotone Model 333 behind-the-ear hearing aid was manufactured by Sonotone International, Inc. of New York in 1957. It was an unusual and weird-looking hearing aid.

It contained 3 transistors and used a No. 400 battery.

The slit on the end reveals the serial number.

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Top view showing the microphone port (left center), the battery compartment (middle) and the receiver connection (right).


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Rear view of the Sonotone Model 333.

 

 

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Bottom end view of the Sonotone 333.

 

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The Sonotone Model 333 with an ear mold attached.

If you had never seen the patent application, you would not suspect this was really a BTE aid rather than some strange body aid.

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Picture of a different Sonotone Model 333 (not in museum) with an ear mold configured for use as a BTE hearing aid. Note that the battery door (which is missing in all the other pictures) is present.

 

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Another view of the Sonotone 333 showing just how "clunky" this BTE aid was.

 


 

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