Audio as a weapon


I would like to deviate a bit from the normal audio equipment conversation and delve into the phenomenon of the recent audio "weapon" that appears to have been deployed in Cuba upon State Department employees and now, it appears, in China. I know that very low frequency can be dreadful to listen to but anyone out there have any ideas with regard to how audio could be used as a weapon? It is not my intention to draw speculation of a political nature, I am only interested in the technical aspect of audio as a "weapon". Anyone have any thoughts?
128x128falconquest
It is up to us to use good hifi systems to fight back against our oppressors. We have become a militarized police state. Bring on the dBs. Society will recognize audiophiles at last.
Remember this?
https://youtu.be/xywQQXrYi5s
Experiment for yourself(though these use high freq & square wave sweeps) : https://www.amazing1.com/ultrasonics.html  You may recognize the same Motorola piezo, that was used in the Dahlquist DQ-10, in some of those devices.    
Can I assure everyone it was not (rpt not) a Teleportation Tweak gone awry or a miscalculated trajectory? Or some bizarre hiccup in the space time continuum. At least I don’t think it was.