Method and apparatus for hearing assistance device microphones
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United States of America Patent
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Feb 4, 2014
Grant Date -
Jul 8, 2010
app pub date -
Dec 30, 2009
filing date -
Dec 31, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the present subject matter includes an apparatus, including: a microphone to convert sound into a signal; and an electrically adjustable shutter including conductive polymer, the shutter in acoustic communication with the microphone and configured to provide an adjustable acoustic resistance to the microphone. Variations include conductive traces adapted to apply an electric signal to the conductive polymer. In some embodiments a diaphragm in acoustic communication with the shutter configured to detect acoustic energy is included. The present subject matter also provides methods including, but not limited to a method for operating a microphone in a hearing assistance device, including measuring acoustic energy detected by a diaphragm in acoustic communication with a shutter via a conduit, and controllably adjusting an acoustic resistance of the shutter with an electric signal to change directionality of the microphone.
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