Researchers develop battery-free 3D-printed metal tags for smart tracking that use ultrasonic sound to record everyday actions | Daily Reports Online
Battery-free metal tags generate ultrasonic signals when objects move nearby Different disk shapes create unique sound signatures that identify tracked actions Simulation tools produced hundreds of tag designs for varied real-world tracking uses Researchers at Georgia Tech have built tiny metal tags that record everyday actions without needing batteries, charging cables, or wired power –…










