No, not a pipe. My dad described it as barbed wire except that it didn't have sharp points, and he didn't know what kind of metal it was, but he isn't exactly a specialist. I should ask for the exact shape perhaps. Apparently we have smaller ones somewhere which we used behind the tv because the tv had interference or something like that.
Another funky thing I forgot to mention: when my dad called the man, the man said he already heard over the phone what was going on, meaning he's either a brilliant con artist (because he made me stop crying after one and a half year, which is brilliant for an... indirect placebo effect, since my parents would have to be convinced and cause me to have less stress to make me stop crying after so long?), which I think is the unlikely of the two options, or whatever it was most likely interfered with my head, the tv and/or the telephone.
The guy was apparently a farmer-ish type of guy. I don't think he knew too much about what he was doing, but I think he did recognize a symptom and found a solution. His explanation might be wrong.
You could perhaps compare the man to someone who keeps seeing the sun coming up in the east and assumes the sun moves in western direction around the earth.
Sure, the man is wrong, but he recognized a pattern and made a conclusion based on it, which wasn't correct but checked out time after time. That the earth is moving around the sun changes nothing about the observation.
In the same sense, I think the man did recognize the symptom but perhaps drew the wrong conclusion. So I'm saying it doesn't have to be earth rays (if it turns out to be rays coming from earth I would still rename them I think, but anyway :P), but something that would result in the same observation, and would also make what seems to be interference go away by placing the metal thing.
I hope I'm sparking a bunch of scientific interest here, I think many of us here know a bunch about physics after all :)