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.

The famous cup of strong espresso, a symbol of waking up for millions of people, could soon change its recipe. Australian researchers have succeeded in reproducing a perfectly authentic ...

Ultrasonic sensors measure the distance between a target and the sensor using high-frequency sound waves that are inaudible to humans. The process is simple: the sensor emits ultrasonic waves, which ...