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Jon Chase challenges young opera singers in Cardiff to smash glasses with their voices. After measuring the natural frequency of the glass, can the singers match it, and with enough power to smash it? The results are spectacular slowed down 300 times. Smashing things with sound wave isn鈥檛 just for fun. In medicine, sound waves can smash painful, hard growths inside the body, called kidney stones.
The sound waves that smashed the glasses travel through air. But the kidney stone smashing waves travel through water. To find out why, two of the singers join Jon by Cardiff Harbour for an experiment. Does sound travel faster in water or air?