BLACKSBURG, Va., April 27 -- Virginia Polytechnic Institute and State University issued the following news release:
Devices and sensors live everywhere these days: inside machines, bridges, even the human body. But when their batteries run out and they're too expensive or difficult to replace, many devices simply stop working.
What if devices for smart infrastructure, automated systems, and advanced medical technologies could be powered without wires or batteries? Researchers at Virginia Tech are exploring an unexpected solution to do so: sound.
High-frequency sound waves - too high for humans to hear - carry energy in waves that can travel through air, water, even solid materials like metal or human tissue. When the sound waves reach a ...