New tech could lead to quieter jets, factories and construction equipment.
via Discovery News http://news.discovery.com/tech/alternative-power-sources/ear-piercing-sounds-harvested-for-energy-131206.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/tech/alternative-power-sources/ear-piercing-sounds-harvested-for-energy-131206.htm#mkcpgn=rssnws1
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