Definitely scary shit.

There are methods that can be used to alleviate the effects of audible offensive weapons, from placards used in protests to some solid shielding otherwise (makeshift riot shield), but for inaudible subsonic weapons, I only have theories based on the way RF works. In short, aluminum foil *should *work to protect from inaudible weapons like shown in the video. If the shield were to be made concave and faced towards its origin, it could end up focusing it back to where it came from as well. “Space blankets” should act as a shield as well without reflecting it back (instead dispersing it).