Immediately makes me remember what happened in Cuba back in 2016, where there were some theories about a "sonic" or "directed-energy" weapon being used, could this in any way be related? https://en.wikipedia.org/wiki/Havana_syndrome

Here's a paper reviewing and collating other papers: https://www.degruyterbrill.com/document/doi/10.1515/reveh-20...

Since 2016, numerous American and Canadian diplomats and secret (intelligence) agents in Cuba, China, and other places in the world have experienced an abrupt onset of unusual clinical symptoms including, tinnitus, vertigo, visual problems, and cognitive difficulties, after they encountered strange sounds or sensations; this has been called “Havana syndrome”

In a comprehensive report, the National Academies of Sciences, Engineering, and Medicine concluded that the most plausible mechanism for HS is a directed, pulsed radio frequency (RF) energy source