A Michigan lab is exploring an idea for generating energy from low-frequency ambient sound using tiny ceramic piezoelectric generators — a concept of interest to military planners looking for ever-smaller, cheaper and more durable power sources for sensors. Researchers at the University of Michigan Center for Wireless Integrated Microsystems plan to publish a scheme for a low-frequency-powered ceramic piezoelectric generator in an upcoming issue of the Journal of Microelectromechanical ...

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