Frey Effect

Type: Concept

As of November 2026, Frey Effect has been mentioned in one podcast episode on The Infographics Show (Jan 2026). Scientific principle explaining the use of directed energy weapons in the raid.

The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perception of sounds induced by pulsed or modulated radio frequencies. The perceived sounds 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. In 1961, the American neuroscientist Allan H. Frey studied this phenomenon and was t