Imagine if all you needed to put out fire was a sub-woofer. It’s an idea that has been toyed with, theoretically, over the years. Now, for the first time, a handheld extinguisher exists that uses not foam, powder or water, but the waves produced by a low-frequency sound.

The technology is based on the way sound waves displace oxygen as they move through physical space — oxygen that fire feeds on.

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