[nemo44x]

A couple things on this:

Myth Busters was great. But for some of their tests you need to keep in mind they built a model with limitations (such as their assumptions) and tried to replicate a claim. In certain cases they were unable to replicate either due to an incomplete model or trying to replicate something that was never published as science in the first place. In their case the endless shape and size of fillings, location, signal frequency and strength, other things that could amplify, etc.

I know it happened because it happened to me once. With a sound mind, unencumbered by substance, and able to test. I could never replicate outside of the one time. But during that time if I moved my head one way (I assume my saliva and contents of it moving) it would go away. Moving it back, the sound was clear. Very tinny, vibrational if that makes sense, but there. Coming from the inside. I remember the weather from that day even as it was such a weird thing.

But I could never replicate.

They are right in saying they could not replicate. But it’s theoretically possible to create a semiconductor with saliva solution and a filling and pick up a strong enough signal in a certain position.