Was it Cuba? Hard to imagine they have the technological capability to do something like that.
Maybe it was Russia or China operating in Cuba.
How “Hi-Tech” do you have to be to build such a device? The effects of high-frequency noise have been written about and supposedly the US and other countries have fielded sonic weapons for crowd control. The knowledge is out there.
It smells like Russians to me. They have been doing goofy experiments on humans for decades. In the early ‘70’s, they reportedly grafted gills onto men to see if they could breathe under water. And the CIA has been experimenting with sonic weapons forever and a day. Not to mention DARPA. So the likelihood that the symptoms are psychosomatic are about zero.