I’m not sure if this new mechanism is definitely better than the existing sound laser?
As long as the effects of viscosity and diffusion are negligible, the fluid in a moving vortex is carried along with it. In particular, the fluid in the core (and matter trapped by it) tends to remain in the core as the vortex moves about. This is a consequence of Helmholtz's second theorem. Thus vortices (unlike surface waves and pressure waves) can transport mass, energy and momentum over considerable distances compared to their size, with surprisingly little dispersion. This effect is demonstrated by smoke rings and exploited in vortex ring toys and guns.
The tornado sound wave can only move forward and once it hits something is dissipated and doesn't reflect the sound.
But the door is also a sound wave.
Line of sight audio would be wonderful in a crowd.
