"Here, we report that microwave toroidal pulses can be launched by a transient finite-aperture broadband horn antenna emitter, as an electromagnetic counterpart of 'air vortex cannon'," an ...

Using an air vortex cannon strapped to a bass reflex port to wiggle a flame to death. (Credit: The Action Lab) Using a fairly beefy speaker to blast a 70 Hz tone at a big alcohol flame was not ...

He used four valves all plumbed together to provide the volume of air needed. Additionally ... [Tom] tweaked and iterated his way to a working vortex cannon and has continued to refine his ...