There are examples of people receiving AM radio transmissions in their heads, attributable to the fillings in their teeth.  I always assumed it was something like how crystal-set radios worked.  I am not sure what would work as a search term.  I found one link on pseudo-hallucinations and another on auditory hallucinations that are possibly related to antenna effects: http://www.audiologyonline.com/askexpert/display_question.asp?id=98 I also found some fringie stuff at http://www.raven1.net/bioamp.htm Crystal sets are still available http://www.discoverthis.com/radio.html As a side angle, see if there is a non-polarized plug that you can reverse at your TV or monitor and see if that matters during any recurrence (just a hunch, based on tactile experience I've had with appliances and radios).

Sorry about the   character entities. I was typing HTML and the habit carried over to entering the comment here.

I had something similar happen but in my case it was caused by an interaction with a space heater that was plugged into the same outlet as my monitor. It only occurred when both were turned on.

Too, I’m looking forward (as always) to your upcoming columns and not that this is in any way apropos but Slashdot just had a Gmail discussion over the weekend and I was wondering if anyone has an invite?
Ehofff…@covad.net
My curiosity is in the apparent GMail utilization of iframes and the blog entry on this site, “the Problem With RSS Readers Inspired By Outlook.” Not that one necessarily has anything to do with the other but I would like to take a look at Gmail if Dare or anyone else reading this can help out.