Engineers have experimented with using sonic waves to douse flames for years—but it took a pair of students to turn the concept into an affordable, hand-held device.
Viet Tran and Seth Robertson, who are both students at George Mason University, spent $600 of their own money to build their prototype, according to the school. The canister directs low-frequency waves to a specific point, while an over-the-shoulder pack that weighs about 20 pounds generates the waves
via Gizmodo
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