The listing, (DIY) How to Build a Ghost Box has ended.
A ghost box is a device used by paranormal investigators to channel inaudible voices from what they believe might be ghosts, spirits or demons. The device is based on an ordinary AM/FM radio, which ghost hunters believe paranormal entities can use to "build" audible sounds out of parts of transmissions from regular AM and FM radio stations. Paranormal investigators believe that ghost boxes can be used to hear messages that normally would be inaudible to the human ear.