There are many ways to pick up voices I would not lean towards any one or another. I have been reading some misleading information over the last few hours not here but on a few other sites, and learned a few more things which I feel are important to 'making contact'.
First it seems as thought we need to have a rapport of a sort - not necessarily a belief - not even a feeling - I myself and not a 'believer' nor am I a 'dis-believer'; I have however had EVP experiences I cant explain; those were the first evidences of to me there must be something is out there...
I have been reading recent threads on this Germanium idea; nice ti have a tekky describe it's nature abit here; I too am a tekky as well as an Astral Travellor; I have read possibilities of electromagnetic and electrostatic devices used to get responses from entities in other dimensions ot time and space.
I think Thomas Edison was working on this but now I cant recall.
What I have found over the 40+ years and reading thru many reports, is that differnt people will respond to different ideas and methods better than other people - we are afterall individual.
While terminology useage in my opinion is overrated, we need to take a step back and feel some sort of, well not only relevance, but respect and reverance to all of this.
The fact that some of us are 'in tune' with 'other worldy' aspects of life, means we even have an obligation to pursue those radio stations; now that is quite a paranormal analogy that comes from some of my latest research.
If you feel drawn to a device I say go with it; I would just feel though, in my case since I started out with EVP recordings on an analogue microcassette, I always use that as a standard; something to fal back on.
More technologically oriented 'entities' called 'Technicians' are looking for people like you and me - dont give up - you are being called (!); and some day you wil answer that phone...