Konstantin Raudive was, among other things, an EVP researcher in the 1960’s and 70’s, who devised a method of improving the quality of his EVP recordings.
Through experimentation he found that using a Germanium Diode plugged into a recorder instead of a microphone vastly helped improve the quality of the disembodied voices. We have found that the Germanium Crystal Diode is capable of picking up radio waves much like an old crystal radio set.
Konstantin Raudive devised his own method of improving the quality of his EVP recordings.
This is Apparition Technologies’ version of the Raudive.