“Imagine a household appliance that could provide electric power for your home as reliably, affordably and inconspicuously as your kitchen refrigerator provides cold air for your perishables.  The technology is called thermoacoustics and it uses sound to turn heat into electric power. That’s right, ‘sound.’  The Power Stick is less than 32 inches in length and 10 inches in diameter. It weighs less than 60 pounds and is quiet enough to be placed in your kitchen.  The Power Stick (or, TAPS) produces between one and four kilowatts (KW) of electrical power and 15 and 30 KW of thermal energy (i.e., heat) with a total system efficiency above 90%.”

http://www.forbes.com/sites/williampentland/2013/12/10/silicon-valley-start-up-company-powers-homes-with-sound-waves/

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