Fascinating, but the explanation they gave in the video seems bogus. Mathematically predicting how air currents will convert ultrasound into human range? Bullsh

Fascinating, but the explanation they gave in the video seems bogus. Mathematically predicting how air currents will convert ultrasound into human range? Bullshit. If it's really beaming ultrasound then I suspect it relies on constructive interference to produce audible sound.