It's hard to credit "mass hysterical brain damage" as being real. Nor are these ultrasound attacks. Ultrasound doesn't penetrate walls and windows. Microwave

It's hard to credit "mass hysterical brain damage" as being real. Nor are these ultrasound attacks. Ultrasound doesn't penetrate walls and windows. Microwaves, on the other hand, directed by large panels of phased array patches, can not only focus and track objects through walls (i.e. radar vision), with a proper control system, can focus intense CW or Pulses directly on a moving target, like a persons skull. These were not surveillance attempts, these were focused attacks on lone victims who weren't carrying microwave field meters, nor any RF protection. Both the Russians and Chinese have the technical skill and motivation to develop these microwave attack systems. What is not clear is whether there are magic frequencies and waveforms that cause more neural damage than ordinary microwave white noise. Exciting resonances in particular biological molecules could possibly cause enhanced long term damage, with fairly low peak power limits. This type of research, of course, is kept secret.