Sound-powered sensors stand to save millions of batteries

https://techxplore.com/news/2024-01-powered-sensors-millions-batteries.html

"sensor of sound waves, can distinguish 12 words... thumbnail size or smaller... sensor comprises dozens of metamaterial silicone plates interconnected via tiny springs... sensors (monitoring earthquakes, buildings, decommissioned oil wells), medical devices (cochlear implants, eye pressure monitoring)"

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Hybrid energy harvesters that harness heat and vibration simultaneously
https://techxplore.com/news/2024-01-hybrid-energy-harvesters-harness-vibration.html

Scientists discover super sensor for the smallest scales
https://phys.org/news/2024-03-scientists-super-sensor-smallest-scales.html

New topological metamaterial amplifies sound waves exponentially
https://phys.org/news/2024-03-topological-metamaterial-amplifies-exponentially.html

UC San Diego researchers develop low-cost, scalable passive sensors
https://www.eurekalert.org/news-releases/1063822