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

Ultrasonic espresso’ made with cold water and high-frequency sound waves uses less energy than the traditional version – and taste tests show it’s just as good.
WHYY

What does the perfect cup of coffee sound like?

Tiny popping sounds are a roaster’s secret road map. Do you have a Pavlovian response to the sound of coffee beans being ground? If you answered “yes,” you aren’t alone. According to an online survey ...
The Guardian

‘Like drinking a music festival’: this is ultrasonic coffee – but does it taste any good?

Australian scientists have developed a method of brewing coffee by blasting ground beans with sound waves – and it produces a powerful cup I’m looking at a coffee that’s thick, cold and the deep brown ...
Gadget Review on MSN

Sound waves just brewed espresso without heat—and nobody could tell

Ultrasonic espresso brewed at room temperature matched traditional shots in blind taste tests while cutting energy use by 75%.