It was in 1995 that Franks Box Inventor Frank Sumption would come across an article in Popular Electronics with regards to Electronic Voice Phenomena. This would cause the initial spark needed that would eventually give birth to a plethora of designs in the paranormal research community today.
However, Frank would not find the success he desired with his initial EVP experiments, such was the lack of results, he would allegedly shelf the whole area for five years, before resuming his interest in this area.
So how does it work, how can a device that is constructed to pick up radio waves, be used to communicate with the afterlife. This is what is ringing within the minds of the public and those involved in paranormal research.
You have various camps, with a varying amount of beliefs, with some content to use their engineering background to dissect such equipment, and others, their spiritual gifts to tune in and gain information from spirit.