Miniature non-directional microphone
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United States of America Patent
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Feb 12, 2013
Grant Date -
Jun 23, 2011
app pub date -
Mar 3, 2011
filing date -
Oct 18, 2006
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Abstract
A miniature microphone comprising a diaphragm compliantly suspended over an enclosed air volume having a vent port is provided, wherein an effective stiffness of the diaphragm with respect to displacement by acoustic vibrations is controlled principally by the enclosed air volume and the port. The microphone may be formed using silicon microfabrication techniques and has sensitivity to sound pressure substantially unrelated to the size of the diaphragm over a broad range of realistic sizes. The diaphragm is rotatively suspend for movement through an arc in response to acoustic vibrations, for example by beams or tabs, and has a surrounding perimeter slit separating the diaphragm from its support structure. The air volume behind the diaphragm provides a restoring spring force for the diaphragm. The microphone's sensitivity is related to the air volume, perimeter slit, and stiffness of the diaphragm and its mechanical supports, and not the area of the diaphragm.
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- 15 United States
- 10 France
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Patent Owner(s)
- THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORK
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Miles, Ronald N | Newark Valley, US | 18 | 213 |
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