I used sound waves to make espresso

🫧 Open on Bubbles Francisco Trujillo at The Conversation : We have developed what we call an ultrasonic espresso: a room-temperature brewing process that uses high-frequency sound waves to extract the flavour, oils, aroma and caffeine from coffee grounds. The result is an espresso-strength coffee made in under three minutes, but needing far less energy than the conventional method. I can’t wait for James Hoffman ’s take on this. — Thanks for keeping RSS going! I’d love to hear your thoughts. Send me an e-ma