alt Hacker NewsWell, a search for "youtube acoustic fire extinguisher" indicates it has already been invented a few times by people all over the world. The most interesting video is https://www.youtube.com/watch?v=ZvnCQg4w4o8
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biffert8 • today at 3:13 AM
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I'll bet that high school girl's science was better than what's in that youtube (it doesn't set a very high bar)