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.

 

Conversation Tubes

Therapeutic Conversation Tube

The Therapeutic Speaking Tube is a relatively modern conversation tube manufactured by the Electronics Development Company of Minneapolis, MN in 1964.

This conversation tube measured 45" (114.3 cm) from tip to tip and weighed 5.9 oz. (170 g).

It is somewhat ironic that a company with a name like the "Electronics Development Co." would make, not a transistorized hearing aid, but an acoustic speaking tube.

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Unlike conversation tubes of the previous century, the Therapeutic Speaking Tube was made of soft rubber or plastic and was not tapered.

 

 

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Also, the bell of the Therapeutic Speaking Tube was made of polished metal (not aluminum). When tapped, it tinkles.

The comfortable handle was 4⅝" (11.8 cm) long while the bell itself was 3" (7.6 cm) long.

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Close-up view of the mouth of the bell of the Therapeutic Speaking Tube. The bell measured 3 1/16" (7.8 cm) in diameter.

 

 

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Side view of the earpiece. It was made of dark red plastic.

 

 

 

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Close-up of the ear tip showing the rather large hole in the end—¼" (0.6 cm).

 

 

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The Therapeutic Speaking Tube in its original box.

 

 

 

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Close-up view of the inside of the lid of the Therapeutic Speaking Tube box. It reads "Therapeutic Speaking Tube", the initials of the company "EDC" and in tiny letters below that "The Home of Computer Hearing Technology". At the bottom is the company name "Electronic Development Co." and "4020 West Lake Street, Minneapolis, Minnesota  55416".

 

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Outside view of the box the Therapeutic Speaking Tube came in. The box measured 12" x 7¼" x 3⅜" (30.5 x 18.4 x 8.6 cm).

 


 

 

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