Not so, if you use a pair of specialised ultrasonic transducer arrays to move the air instead! (Video, embedded below) Three banks of thrusters provide a 180 degree steerable net force Details are ...

Most often ultrasonic transducers are used for distance measurements, and in the DIY world, usually as a way for robots to detect obstacles. But for a weekend project, [Vinod.S] took the ...

The "Ultrasonic Testing Market by Phased Array, Time-of-flight Diffraction, Immersion Testing, Guided Wave Testing, Acoustography, Flaw Detectors, Thickness Gauges, Transducers & Probes ...