In Frank Herbert's science fiction novel "Dune"—first serialized in "Analog" from 1963 to 1965 and then published independently in August 1965—the Baron Harkonnen employs a "cone of silence" when having a private discussion with Count Fenring. In the novel's glossary, Herbert describes the device as the sound-deadening "field of a distorter that limits the carrying power of the voice or any other vibrator by damping the vibrations with an image-vibration 180 degrees out of phase". Used for privacy, the field does not visually obscure lip movement. Herbert had previously mentioned the cone of silence, on a much smaller scale, in his 1955 short story "Cease Fire".