Those EMF voices are fake. You can stand about 20 yards from a TV in another room and turn the microphone on a PC on and make sounds like that. Then you just simply mess about with it until it sounds about right.
White noise is generated by energy in the environment. Static electricity from the fans and motors in PC's generate large amounts of static, along with underground or overhead electric lines.
In fact, if you stand close enough you can hear the noise from national grid power lines.
The fact that we are told that we hear a voice, makes it even worse. If you amplify any part of a static signal, you are bound to hear something that sounds like a human voice, literrally because we all hear hundreds of thousands of words spoken every day.
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