'white noise' with michael keaton dealt with this. it was a pretty good movie, though i found the ending unsatisfying. definitely check it out, though, as it's got a lot of creepy parts... eventually.
my thought on it? it's BS, plain and simple. just my opinion, of course. but take someone predisposed to such things and have them take a photograph (almost invariably of trees) of something and they're likely to find a random patch that indeed does look like a face. and that proves nothing, lol. (my neighbour is kind of a kook who believes her then recently deceased father showed up in her backyard and she's shown me the photographic 'evidence' to prove it. i didn't have the heart to tell her i thought it was an UFO.)
it's indeed interesting, though. there's a society of such EVP's, i believe, who get together to share their recordings which are conveniently done, and i think recommended, with low-tech equipment.
ever hear of a whirling dervish? they're religious fanatics who believe that by spinning around and around in fast circles they'll, i don't know, reach a higher state of being or some crap. and i'm sure that were i really wanting to believe that riding the tea-cups at king's island would make me have a religious experience, i'd have one once all my senses were screwed up. doesn't mean scooby-doo is a god, though. personally, i have to question an enlightening experience which makes me puke the same way i question playing around with technology in such as way as to illicit fuzzy 'evidence'.
i'd heard a few of these recordings. of course, i wouldn't trust a damn thing i heard off the net. you'd be foolish to do so. but, some of the ones that seemed done in earnest were pretty vague snippets of sounds that, while sounding faintly like a human voice and distorted words *on occasion*, could have been anything.
is it a hoax? i believe the people who play around with this stuff believe it's 100% legit. so do whirling dervishes. so do children believe in santa clause, who leaves 'evidence' of his existance every x-mas.
it's weird and fun and interesting and more than likely just a bunch of hooey when you get right down to it. of course, i haven't read my 'skeptical inquirer' in awhile, so i have no scientific 'proof' one way or another.
oh, holy crap, folks, you're not going to believe this, but i think i just saw elvis' face in my dog's fur as she just walked by! speak to me elvis, speak to me! i know, if i cup this coffee mug left over from this morning (gotta get on the wife about that) over my ear, he'll impart great wisdom. what's that? good to the last drop, ya say? well, i'll be buggered. this information is hotter'n a firecracker. i'd better alert the 'elvis sighting' society pronto.