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

Oticon Model 371 LDC Transistor (Body) Hearing Aid

The Oticon Model 371 LDC was manufactured by Oticon A/S of Denmark in 1971.

This body aid measured 2 7/16" x 1⅞" x   ¾" (6.2 x 4.8 x 1.9 cm) and weighed 1.6 oz. (46 g) without the battery.

 

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Top view of the Oticon 371 LDC showing the "M" (microphone), "MT" (microphone & t-coil) and "T" (t-coil) switch (bottom right), the 1-9 volume control wheel (top right), the "H" (high), "N" (normal) and "L" (low) tone switch (bottom left) and the On (+) -Off (0) switch (top left).

The microphone grill is in the center.


 

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Rear view of the Oticon 371 LDC showing the model 371 LDC (near bottom center) and below it the serial number (361452) set in the "window".

To the left of the model number is a yellow dot (purpose unknown).

Above the model number are two small adjusting holes. The left is labeled "0" and the right "A".

 

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Bottom view of the Oticon 371 LDC showing the battery compartment. This hearing aid took a 1.4 volt mercury size 401 or "N" battery.


 

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The battery compartment cover just snapped off to change the battery.

 

 

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The Oticon 371 LDC came in two versions. This one had an aluminum case with dark gray plastic top and bottom.

The wire pocket clip is higher than the version below.
 

 

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This version had a light gray plastic case with dark gray plastic top and bottom.

The wire pocket clip is not as high as the above version.

 

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Side view of the Oticon 371 LDC showing how the receiver cord plugged into the two-hole jack on the left side.

 

 

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Close-up of the receiver of the Oticon 371 LDC showing the receiver cord plug and two-hole jack on the receiver.

 

 

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The ear mold (right) snapped onto the nubbin in the center of the receiver (left).

 

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This hearing aid came with a "Y" cord and two receivers so both ears could benefit from amplified sound. Unlike most "Y" cords, this "Y" cord was unusual in that it had a variable balance control on the "Y" to adjust the amount of volume going to each ear.

This was important if each ear had a different degree of hearing loss.

 

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The Oticon 371 LDC in its original case. Note the two receivers/ear molds and "Y" cord.

 

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Outside view of the original case of the Oticon 371 LDC hearing aid.

 

 

 

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