“Raudive studied parapsychology all his life, and was especially interested in the possibility of the afterlife. He and German parapsychologist Hans Bender investigated Electronic Voice Phenomena (EVP). He published a book on EVP, Breakthrough in 1971. Raudive was a scientist as well as a practising Roman Catholic.” http://en.wikipedia.org/wiki/Konstant%C4%ABns_Raudive