Patent ID: 8585050

Claim:
A sheet handling apparatus comprising: a transport path; a device adapted to separate a first sheet from a plurality of stacked sheets and to feed the first sheet into the transport path; only one detector positioned near the transport path to detect a signal indicative of a multifeed condition indicating that a second sheet is overlapping the first sheet and a signal indicative of a misfeed condition indicating that the first sheet is being damaged in the transport path; and a processing system coupled to the detector, adapted to receive and process signals from the detector and to filter the audio signals into separate first and second frequency bands for separate processing, wherein the first frequency band is used to determine the multifeed condition and the second frequency band is used to determine the misfeed condition, the processing system configured to determine either a multifeed in the transport path or a misfeed in the transport path and to terminate feeding sheets in response to the determination.