[Lindsay] has a wonderful writeup about a new toy in the shop, an ultrasonic transducer. The 28kHz, 70W bolt-clamped Langevin transducer by itself is not much use, you need a power supply, a horn to ...

It is hoped the Dundee device could improve ultrasound surgery Scientists claim to have invented their own version of Doctor Who's famous sonic screwdriver. The Dundee University researchers have ...