https://www.cia.gov/library/readingroom/docs/CIA-RDP96-00788R001700210016-5.pdf

“…this is occurring at very long wavelength of about 40,000km, or just about the perimeter of the planet. In other words, the signal from the movement of our bodies will go around the world in about one seventh of a second through the electrostatic field which we are embedded. Such a long wavelength knows no obstacles and its strength does not attenuate much over long distances. Naturally it will go through just about anything; metal, concrete, water and the fields making up our bodies. It is also the ideal medium for conveying a telepathic signal….”

-Itzhak Bentov, a scientist who worked on the CIA’s Gateway Process.

https://medium.com/@sergiofmonteiro/cias-gateway-process-declassified-b0889cc2c536