Everyone here got so political and it's a shame nobody is discussing counter-measures available. Sound is one of the easiest forms of energy to manipulate, it i

Everyone here got so political and it's a shame nobody is discussing counter-measures available. Sound is one of the easiest forms of energy to manipulate, it is easily absorbed, reflected and reverberated. Because these systems exploit resonance in the skull and inner ear, in theory a thick motorcycle helmet should do the heavy work already for blocking some of these from reaching your skull, as well as blocking any random projectiles flying around. Additionally wool blankets or other thick, soft materials can be wrapped around the neck+head part to further reduce waves from entering your skull and resonating there. Also if you can identify the dominant frequencies used by the device, you could design surfaces with materials that reflect or diffuse those waves effectively. Something like an array of concave acoustic reflectors or even a shield coated with a material tuned to reflect those frequencies might work. Redirecting the sound back at riot police would be ironic — wonder if they’d be as comfortable with it as they are deploying it against crowds. :D