AssetID: 55776301
Headline: Scientists brew espresso using room-temperature water and sound waves
Caption: Scientists brew espresso using room-temperature water and sound waves. Researchers at UNSW Sydney have created a new way to make espresso using room-temperature water and ultrasonic sound waves. The method can reduce energy use by up to 75% compared with traditional espresso brewing. High-frequency sound waves extract flavour, aroma and caffeine from coffee grounds without the need for heat. Scientists say the process produces espresso-strength coffee in less than three minutes. In blind taste tests, around 100 regular coffee drinkers could not tell the difference between the ultrasonic coffee and a traditional espresso. The technology uses tiny collapsing bubbles to quickly release flavour compounds, oils and caffeine into the water. Researchers believe the system could help large-scale coffee manufacturers produce ready-to-drink beverages more efficiently.
Keywords: Science & Technology,Scientists,brew,espresso,room-temperature,water,sound waves,researchers,UNSW Sydney,ultrasonic,method,energy use,espresso brewing,flavour,aroma,caffeine,coffee grounds,blind taste tests,drink,ready-to-drink,beverages
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