Mysterious health attacks like those seen in Cuba have come to DC
arstechnica.com
arstechnica.com
https://en.wikipedia.org/wiki/Microwave_auditory_effect
I would imagine that kinda of thing would be smaller, cheaper and faster 60 year later particularly with recent developments in microwave power electronics.
Maybe some Cuban students cooked one up at the E.E. department (are they allowed to import Gallium Nitride transitors?), maybe you can find one on Alibaba if you look hard enough.
The "targeted individual" community may wind up vindicated in the end.
99% Mass psychogenic illness.
1% Microwave tuned to harm the inner ear.
Only commonality is that the victims are Government employees. Using something, or doing something.
Better to blame it on 'adversaries' than to be on the hook for millions of dollars of Workers' Compensation payments.