1.  The hearing of voices, usually sharing of information or answering questions, primarily during a séance. The voices are heard coming from near the medium or out of a megaphone known as a “horn” or “trumpet.” The voice does not come from the medium.

One of the most famous cases of DVP took place during séances given by “Margery.” While being tested by Houdini, she had to breathe into a device that would visually indicate that she could not be using her own voice. Houdini claimed that he proved her a fake, but his assistant later claimed that the master magician had him plant fake evidence.

See also:  DVP