Nice followup, at first glance - wonder if the US Army bothered to check with the French.
Having built at least the prototype shown, one might suppose that they had found some other poor fucking mammals to try it out on, quite a while back from '99. A little physics calc. on the 17M wavelength vs radial dispersion.. should aso prompt a little more informative a rebuttal than, "can't work". Faith-based, perhaps?
Though one can grok the different efficiencies twixt 'chair bolted to floor' VS air - methinks that the link no more proves 'won't work' - than does the French prototype's existence prove the opposite. Square One: so then, what About infrasound weapons ??
Guess: classified. Either way. Sometimes the threat is enough. Reminds me of an observation *cough*