Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection
Reexamination Certificate
2005-08-19
2010-10-26
Gregory, Bernarr E (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Echo systems
Presence or movement only detection
C367S087000, C367S094000, C367S135000, C367S136000, C342S027000, C342S028000, C342S089000, C342S090000, C342S175000, C342S192000, C342S193000, C342S195000, C342S196000
Reexamination Certificate
active
07821870
ABSTRACT:
An acoustic tone at a predetermined frequency is detected after being reflected and modulated by an unknown moving object. Acoustic features are extracted from the reflected acoustic tone using acoustic spectral analysis. A dimensionality of the acoustic features is reduced, and the reduced dimensionality features are statistically classified to identify the object.
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Brinkman Dirk
Gregory Bernarr E
Mitsubishi Electric Research Laboratories Inc.
Vinokur Gene
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