MadSci Network: Physics |
Well, I have read of cases where individuals pick up radio broadcasts in their teeth. This can only occur in the presence of a very strong signal with AM modulation (such as might occur near a powerful AM radio station transmitting antenna). What happens is that a filling may, just by chance, have electrical properties that allow it to rectify the radio signal, and this simple process is all it takes to get the audio signal off of the radio carrier. Indeed, that is exactly why the first-used, and still popular radio broadcasts where all AM modulated -- a simple crystal (which acts as a diode) provides a very simple cheap receiver. Maybe one of your fillings is doing the same thing. I seem to remember that in some other cases, individuals have been able to 'hear' strong radio signals through some other, obscure process in the ear system. So if you live near a strong transmitter, this _might_ be your problem. But I am no expert in these matters -- your physician might be able to refer you to someone who knows a lot more about these effects.
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