Tag Archives | harvesting


Electrosmog harvested to produce electricity

Using inexpensive materials configured and tuned to capture ambient signals from the electromagnetic spectrum, Duke University researchers have designed a power-harvesting device with efficiency similar to that of modern solar panels. In a demonstration, the device wirelessly converted microwave signals to direct current voltage capable of recharging a cell phone battery or other electronic device, […]

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Acoustic diode allows one-way sound transmission

Based on a simple assembly of granular crystals that transmit sound vibrations, Caltech researchers have created the first tunable acoustic diode that allows sound to travel only in one direction. “We exploited a physical mechanism that causes a sharp transition between transmitting and non-transmitting states of the diode,” explained Chiara Daraio, lead author of the […]

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