Maybe it isn't ghosts we're dealing with when it comes to the ghost box radios. EVPs I would believe by default to come from spirits. But since ghost boxes are technology, I don't know, I for some reason feel like the mind of the user can affect what comes out of the radio.
But it does work. Whatever it is. It's not about capturing EVPs, it's about giving the spirits (or whatever it is) a loud conduit to use as their voice. They have to tap into universal randomness in order to do it.
Hard to describe, but it's like retropsychokinesis (RPK), where you can affect the outcome of numbers coming out of a random number generator, retroactively. In effect slightly changing the past to produce desired results in the present. Randomness is the soup of the universe, and when you're skipping through a bunch of radio stations the audio (feedback) is truly random data from which "it" "they" or "us" can pluck responses, since it, they, or us has retroactively influenced which random data will be where and when.
I'm pretty sure you could have a ghost box repeat words at you all day long. This in itself is interesting phenomena that gardens further study, but indeed it might not be the right tool for ghost hunting, who knows.
Yeah, I hear what you are saying. It might be possible that it has something to do with human consciousness messing with the radio, it is notable that the human brain is a giant EMF device basically, so maybe it can affect electric devices external of the body via electro magnetics. You could be on to a whole new scientific study of how the mind can affect devices via the consciousness. Interesting stuff I need to smoke a blunt before having a thought experiment on.
Intelligent paranormal activity and demonic activity both which I can assure you from my personal experience are very real. Normally can communicate via EVP, and the best EVP's are when the researchers hear it and it shows up on the audio and requires no audio manipulation to understand the words. These are Class A evp's and those are the best evidence for the existence of ghosts being intelligent and dead human beings and or demonic entities because of the nature of the words being recorded.