Reading the whole article...no one knows nothing...and this sonic-device is simply a suggestion by the US. The fact that this has affected five foreign service employees and their wive (but not the kids of those employees)...would invite the question if all five live in the same apartment house or building. In the end, there’s a strong suggestion that this was a third group (suggesting Russia perhaps) that caused this.
Scripted like the opening of a James Bond thriller, with the evil Doctor ‘Juan’ at work.