Microwaves are a form of electromagnetic which are used for wireless networks, satellite communications, cellphones and cooking food.
Another usage is that of a weapon.
In 2012 Russia’s Defense Minister announced that direct-energy and wave-energy weapons were “part of the state arms procurement program for 2011-2020”. The U.S. military have themselves been working on direct energy weapons — such as microwaves.
The ‘Frey effect’ was discovered by Dr. Allan Frey in 1961. This effect could have been responsible for a certain incident in Cuba. The following link will give details of it:
The Frey effect (also known as the microwave auditory effect) would explain why the diplomats all reported hearing strange noises at the time of the attacks. Allan Frey describes the effect as being due to our brains interpreting microwaves as sounds.
Though no actual sound waves are present, microwaves hitting the head around the temporal lobe are perceived as sounds — a kind of auditory illusion. This could explain why some diplomats reported covering their ears yet experiencing no reduction in sound volume.
A leading researcher into the Frey effect, Dr. James C. Lin, has produced a scientific paper exploring the validity of microwave weapons in the Cuba attacks. Lin concluded that symptoms reported, including nausea, dizziness, and damage to brain tissue, could also be plausibly attributed to high-intensity microwave beams.