'Battery-free, quiet, and inherently private' — These 3D-printed metal tags could change home and office tracking, turning penny-sized discs into smart devices using ultrasonic tech for maintenance-free monitoring without charging

Researchers at Georgia Tech develop battery-free 3D-printed metal tags for smart tracking that use ultrasonic sound to record everyday actions.

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 Apr 28, 2026  0  0
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'Battery-free, quiet, and inherently private' — These 3D-printed metal tags could change home and office tracking, turning penny-sized discs into smart devices using ultrasonic tech for maintenance-free monitoring without charging
Researchers at Georgia Tech develop battery-free 3D-printed metal tags for smart tracking that use ultrasonic sound to record everyday actions.
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