HISTORY

1920s - Thomas Edison attempted to invent a machine that would enable communication with the dead. After much trial and error he was unsuccessful.
1939 - American photographer Attila von Szalay achieved a modicum of success capturing spirit voices using a phonograph record cutter.
1940 - Italian Marcello Bacci claimed to be able to pick up voices of the dead on a vacuum tube radio.
1952 - Father Ernetti and Father Gemelli, two Catholic priests, were recording Gregorian chants on a magnetophone. The wire on the machine kept breaking, and in response to Father Gemelli's plea for help to his deceased father, there was a message on the recording, in his father's voice.
1959 - Swedish film producer Friedrich Juergenson recorded voices while taping bird songs. It is at this point that the true age of EVP's came into being.
late 1950s - Szalay's experiments were documented in an article for the American Society for Psychical Research.
1967 - Inspired by Juergenson's work, Latvian psychologist Dr. Konstantin Raudive began experimenting with EVP.

Research and experimentation have continued on into the present day by numerous individuals and organizations interested in the paranormal and expanding the field of paranormal investigation.