The ghost box was created by Frank Sumption, supposedly with the help of the spirit world. The device is basically a white-noise generator and AM radio designed to scan frequencies and generate snippets of sounds. The theory is that the spirits can electronically manipulate this device and carry on a two way conversation with the living.
Personally I am a believer in EVP and believe that they may be an actual attempt by an entity to communicate with the living. But I do have to say that I am skeptical of the ghost box because it does scan radio frequencies, and because of this, I do believe it is entirely possible that stray radio signals could contaminate the device and cause misinterpretation’s of these sounds and lead to auditory pareidolia and misinterpretation’s.