3D-printed acoustic metamaterial is shaped in such a way that it sends incoming sounds back to where they came from.
https://www.fastcompany.com/90316833/scientists-have-discovered-a-shape-that-blocks-all-sound-even-your-co-workers
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☆ Dmitri ☭ (yogthos@mastodon.social)'s status on Wednesday, 13-Mar-2019 14:39:37 EDT ☆ Dmitri ☭