I used sound waves to make espresso. It could cut coffee‑brewing energy use by ¾ : hackernews@lemmy.bestiver.se

I used sound waves to make espresso. It could cut coffee‑brewing energy use by ¾ (theconversation.com)

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I used sound waves to make espresso. It could cut coffee-brewing energy use by 75% (theconversation.com)

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I used sound waves to make espresso. It could cut coffee-brewing energy use by 75% (theconversation.com)

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I used sound waves to make espresso. It could cut coffee-brewing energy use by 75% (theconversation.com)

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I used sound waves to make espresso. It could cut coffee-brewing energy use by 75% (theconversation.com)

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