| 摘要 |
Movements of objects within a space are adaptively detected by emitting ultrasound waves into the space and detecting reflections of the ultrasound waves, determining locations of objects within the space based on the ultrasound reflections, and determining real-time movements of the objects based on, in certain embodiments, (i) amplitude differences between amplitudes of echoes in a current wave cycle and an average amplitude over a plurality of wave cycles and (ii) elapsed times of the ultrasound reflections associated with the amplitude differences.
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