CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search It has been suggested that this article be merged with Electrophonic hearing . ( Discuss ) Proposed since August 2016. The microwave auditory effect , also known as the microwave hearing effect or the Frey effect , consists of audible clicks (or, with speech modulation, spoken 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 . 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. Pulsed microwave radiation can be heard by some worke...