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.

 

Assistive Listening Devices (ALDs)

Phonic Ear Model HC445R FM Receiver

The Phonic Ear Model HC445R FM receiver was made by Phonic Ear Ltd. of Mill Valley, CA around 1975.

It consisted of a  wireless microphone (see the Phonic Ear PE441T) which the person speaking wore and the pager-like FM receiver which the hard of hearing person wore.

The Model HC445R measured 3⅛" x 2¼" x 1" (7.9 x 5.7  x 2.5 cm) and weighed 2½ oz. (70 g).

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Front view of the Phonic Ear Model HC445R FM receiver showing the top of the belt clip in place (top center).

The belt clip slid into the horizontal groove visible at the top right. There was a corresponding groove on the back as well.


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Upper front view of the Phonic Ear Model HC445R FM receiver showing the microphone built in to the rectangular "box" on the unit.

The hole in the center is the microphone grill. The switch on the bottom switches the microphone on or off (shown in the off position). With the microphone turned off, the unit is simply a FM receiver (essentially the same as the PE442R). With the microphone turned on, it becomes a personal amplifier much like the Williams Sound PockeTalker.

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Top view of the Phonic Ear Model HC445R FM receiver showing the on-off/volume control (left) and the color coded dots for the black-colored frequency module (right). In this case, the dots are black and blue.

 

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View of the Phonic Ear Model HC445R FM receiver showing the crystal frequency module removed.

Each module had two color-coded dots indicating a given frequency. The transmitter and receiver had to have the same color codes in order to work with each other.
 

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Rear view of the Phonic Ear Model HC445R FM receiver showing the name plate giving model (HC445R) and the manufacturer. The bottom half consisted of a slide down battery door.

 

 

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Bottom view of the Phonic Ear Model HC445R FM receiver showing the  battery door removed, revealing the battery compartment. This receiver took a standard 9-volt battery.

 

 

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View of the right side of the Phonic Ear Model HC445R FM receiver showing the external battery jack (upper right).
 

 

 

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View of the external battery cord of the Phonic Ear Model HC445R FM receiver. This cord plugged into a 9-volt battery and the other end plugged into the battery jack on the right side of the receiver (shown in above picture).

I'm not sure why you used this arrangement instead of just replacing the battery in the battery compartment when it died. Perhaps it was so when you used a rechargeable battery in the battery compartment and it needed recharging you didn't have to take it out and possibly lose it. You just plugged in the external battery until you had time to recharge it.

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View of the left side of the Phonic Ear Model HC445R FM receiver showing the serial number (left) and the earphone jack (upper right).

 

 

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View of the front of the Phonic Ear Model HC445R FM receiver showing the belt clip removed (right).

 

 

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Rear view of the  Phonic Ear Model HC445R FM receiver showing the large plastic belt clip in place.

 

 


 

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