Bone conduction transducer with increased low frequency performance
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United States of America Patent
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Jun 12, 2018
Issued Date -
Dec 28, 2017
app pub date -
Jun 27, 2016
filing date -
Jun 27, 2016
priority date (Note) -
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Abstract
A bone conduction transducer includes a yoke having a pair of arms, a layer of high permeability steel on a surface of the yoke between the arms, a metal coil, a metallic post that extends into a center portion of the metal coil, a diaphragm, an anvil attached to a surface of the diaphragm, a pair of permanent magnets attached to an opposite surface of the diaphragm, and a pair of springs. A first end of each spring is attached to a respective one of the arms of the yoke, and a second end of each spring is coupled to the diaphragm. The diaphragm is configured to vibrate in response to a signal supplied to the metal coil. The diaphragm, anvil, and/or metallic post could be formed from a high permeability steel.
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