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).
There are actually filed patents and research papers showing that a stationary subject, when hit with the right frequency and intensity of radio energy, will report hearing a sound ‘coming from inside their head’.
To the best of my knowledge, no actual tech that does this is actually used practically as some kind of crowd dispersal weapon… but it is theoretically possible.
https://en.m.wikipedia.org/wiki/Microwave_auditory_effect
If you wanna fuck with someone, auditorily, easily, all you have to do is jerry rig a phone or some other device to basically emit the right kind of dog whistle.
If you consistently expose a human to a sound roughly between 20khz and 24khz… most people cannot consciously hear such a noise, as it is outside of many people’s hearing range… but basically, you hear it subconsciously, and it will make you irritable, angry, lose focus, sometimes nauseous, paranoid.