Lets consider what RF is. Its vibration, probably in the 1.4GHz to 5GHz frequency range. That's about where cell towers operate. That means the wires in your house are coupling to this airborne energy you can not hear with your ear, and they are singing along with it. They are vibrating. That vibration is interacting with the fundamental 60 cycle vibration from the power line. Its probably oscillating in and out of phase.
If I were to wire my grounding wrong, I could be creating a situation like a guitar. I have stretched a wire over two bridges and the wire does nothing but sing for extended periods of time. Now if I wire my grounding correctly, I have created a situation where the wire is more attached to a dense dampening block. The wire no longer sings for extended periods. It shunts the vibrating energy out of the wire quickly.
That is only a small fraction of what I consider when I approach a house. But it is very important. Many times a client has sat stunned at the fundamental improvement grounding a house properly brings. Do it wrong and it might make things worse. Do it wrong and you might be thinking, gee, maybe I should just lift the ground to resolve the ills of my system. And many times people do that, and it works. Its illegal and fundamentally wrong and dangerous on many levels. But it is a last resort based upon most people having no idea how to ground properly.
Rex