[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 ...

Now the same breakthrough dual transducer design that powers our Nexadyne ... Joining the new Nexadynes at NAMM comes a new wireless mic solution from Shure. Building on its popular SLX-D wireless ...