KapuHelapu wrote: most responses from EVP/EXT arefound on old Ultra high UHF receivers, from 990 to 11, 999 mhz
You mean UHF as in TV frequencies. I've often wondered about that, and actually about the "Ghost Box" as well. Both of those types of devices are FM, meaning they're frequency modulated. So what you're hearing are variations in frequency.
May not sound like much but that is actually a very complex scheme for any paranormal entity to emulate. I've often wondered how the EVP's could be coming across any FM modulated frequency. AM, I don't find quite as difficult to grasp. Since thats amplitude modulated, in other words the sound you hear is based on fluctuations in the signals strength. So I could see how an entity trying to talk may cause fluctuations in an EM field at a certain frequency and have that be modulated at the same frequency that the sound was originally, and thus make it audible via AM. Just curious how that would work for FM.