Systems and methods for detecting a document attribute using acoustics
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United States of America Patent
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Jan 10, 2017
Grant Date -
Sep 18, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
Systems and methods for detecting a document attribute using acoustics are provided. In one embodiment, a method for detecting a feature of a document using acoustics includes emitting a first acoustic signal from a first acoustic transmitter to a first acoustic receiver while a document is between the first acoustic transmitter and the first acoustic receiver, and emitting a second acoustic signal from a second acoustic transmitter to a second acoustic receiver while the document is between the second acoustic transmitter and the second acoustic receiver. The second acoustic signal differs from the first acoustic signal. The method also includes determining the presence of a feature of the document using at least one of the first acoustic signal or the second acoustic signal.
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