The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of audible clicks (or, with modulation, whole words) induced by pulsed/modulated microwave frequencies. The clicks are generated directly inside the human head without the need of any receiving electronic device. The effect was first reported by persons working in the vicinity of radar transponders during World War II. These induced sounds are not audible to other people nearby. The microwave auditory effect was later discovered to be inducible with shorter-wavelength portions of the electromagnetic spectrum. During the Cold War era, the American neuroscientist Allan H. Frey studied this phenomenon and was the first to publish[1] information on the nature of the microwave auditory effect. Dr. Don R. Justesen published "Microwaves and Behavior" in The American Psychologist (Volume 30, March 1975, Number 3). Research by NASA in the 1970s[citation needed] showed that this effect occurs as a result of thermal expansion of parts of the human ear around the cochlea, even at low power density. Later, signal modulation was found to produce sounds or words that appeared to originate intracranially. It was studied for its possible use in communications. Both the United States and USSR studied its use in non-lethal weaponry.[citation needed] en.wikipedia.org/wiki/Microwave_auditory_effect
Posted on: Fri, 20 Sep 2013 23:32:32 +0000