Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Reexamination Certificate
2008-05-06
2008-05-06
Pihulic, Dan (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
Reexamination Certificate
active
07369460
ABSTRACT:
Detecting an object using sound waves includes outputting a sound wave from a transducer, receiving an echo after outputting the sound wave, obtaining a threshold value based on the echo and plural other echoes that are within a predetermined range of the echo, and determining if the echo is a result of the sound wave based on the threshold value.
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Sabatini, AM, “Active Hearing for External Ima
Allard James
Chiappetta Mark
Fish & Richardson P.C.
iRobot Corporation
Pihulic Dan
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