Feraliminal Lycanthropizer

The Feraliminal Lycanthropizer is a fictional machine invented by American writer David Woodard, whose 1990 pamphlet of the same title speculates on its history and purpose. The brief, anonymously published work describes a vibration referred to as thanato-auric waves, which the machine electrically generates by combining three infrasonic sinewaves (3 Hz, 9 Hz and 0.56 Hz) with concomitant tapeloops of unspecified spoken text (two beyond the threshold of decipherability, and two beneath the threshold).

via https://en.wikipedia.org/wiki/Feraliminal_Lycanthropizer