The term psychotronic weapons refers to several systems of non-lethal weapons that use electronic and electromagnetic means to directly assault the human nervous system and brain, altering emotional states and behavior.
Invented and patented by Dr. Oliver Lowery  in 1989, Silent Sound Spread Spectrum (SSSS) was used by the Department of Defense in Iraq during the Gulf War in 1991, causing the mass surrender (without a shot being fired) of thousands of Iraqi troops.
In 1974, the USSR registered its Radioson (Radiosleep) device with the Government Committee on Matters of Inventions and Discoveries of the USSR. Radioson was described as “a method of induction of sleep by means of radio waves.”
Actually, the history of electromagnetic weapons dates back to the 1930s, according to Judy Wall’s Electromagnetic Weapons Timeline. Wall, editor and Publisher of Resonance, the Newsletter of MENSA’s Bioelectromagnetics Special Interest Group, has written several articles on various aspects of psychotronic and electromagnetic weaponry, including Military Use of Silent Sound.

Often these products are outsourced to groups known to "be well versed " in coercion "such as Scientology,know to used Voice to Skull, silent sound  technology to convince it's members they have communed with Thetans.The technology is also used by  the U.S. Army as a crowd control weapon.