communications technology taps invisible forces and in turn can be tapped by them
The term "instrumental transcommunication" (ITC) refers to the use of technical instruments such as audio recorders, radios, and televisions for communication with other planes of existence. Perhaps the best known form of ITC is electronic voice phenomenon (EVP) which is the appearance of unexplained short, quiet voices in audio recordings. To learn more about ITC, I recommend visiting World ITC and the American Association of Electronic Voice Phenomena.
I have been experimenting in ITC since spring 2005. I have had results using the following techniques: