Tiny Sonotone Carbon Hearing Aid
The Tiny Sonotone carbon hearing aid was
manufactured in 1930 by Sonotone International, Inc. of New York.
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Front view of the Tiny Sonotone carbon microphone showing the pattern of
the mic grill—12 holes in the outer ring, 6 holes in the middle ring and
one hole in the center. The microphone measured 2¼" in diameter by
11/16" thick. The microphone plugged directly into a battery such as
the
Sonotone Model X42 3-volt battery.
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Rear view of the Tiny Sonotone carbon microphone. Under the pocket
clip (top center) are the words "Sonotone Corp, New York" and just below
the center, the serial number 20111. |
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The volume control/on-off switch shown in the mid volume range.
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The earphone plugs of the Tiny Sonotone. (Unfortunately, the earphone
is missing.)
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