ionospheric ducting - The Skeptic's Dictionary (original) (raw)
Ionospheric ducting is a term used to describe how fragments of radio broadcasts or walkie-talkie communications can travel thousands of miles by occurring in electronic layers of the ionosphere that create small “ducts” that allow them to travel great distances. The observational evidence for long-range propagation of high-frequency radio signals began to accumulate in 1926 when transatlantic communication links had been established. In 1927, signals were detected that had propagated over large distances or circled the Earth with little attenuation.*
According to Jurgen Graff, a former engineer atTelefunken, "a taxi driver communication in New York could suddenly be monitored for a couple of minutes in Europe. After a few minutes the ducts collapse and the phenomenon disappears." (Roach, p. 188).
It is likely that some of the recordings put forth as evidence of spirits communicating from the afterlife are due to ionospheric ducting.
See also electronic voice phenomena andKonstantin Raudive.
further reading
books and articles
Clark, Ronald W. (1977). Edison - The Man Who Made the Future. G. P. Putnam’s Sons.
Roach, Mary. (2005). Spook: Science Tackles the Afterlife. W.W. Norton.
websites
Electronic Voice Phenomena: Voices of the Dead? by James E. Alcock
This is EVP: A Look Behind the "The Ghost Orchid" CD by Mark Poysden
news story
Blasts from the past by Mark Pilkington, The Guardian August 5, 2004
video
Last updated 27-Oct-2015