I used sound waves to make espresso. It could cut coffee‑brewing energy use by 75%

<https://theconversation.com/i-used-sound-waves-to-make-espresso-it-could-cut-coffee-brewing-energy-use-by-75-284929>

"Most of us think of espresso as a hot, high-pressure ritual. Finely ground
coffee goes into a machine, boiling water is forced through it, and in about 30
seconds we get a concentrated shot with crema, aroma, bitterness, body and
caffeine.

As someone from Colombia, I like to think coffee is in my blood – and I’m proud
to come from a country known for producing some of the best coffee beans in the
world.

So perhaps that’s why I have spent a lot of time in my laboratory with my team
asking a simple question: does espresso really need hot water?

Our new research suggests the answer may be no."

Cheers,
       *** Xanni ***
--
mailto:xanni@xanadu.net               Andrew Pam
http://xanadu.com.au/                 Chief Scientist, Xanadu
https://glasswings.com.au/            Partner, Glass Wings
https://sericyb.com.au/               Manager, Serious Cybernetics