> (1) Apparently the sound is no louder at the tower. I would have
> thought it would be, given the sqrt law unless -
>
> (2) there is some beat frequency being created at her home by
> two or more inaudible frequencies, and she just happens to lucky
> enough to be at a place where a combination of beat frequency
> and distance make a node
>
> Any thoughts ? Any similar experiences ?

I've seen two cases close to this one.
The first was finally tracked down to a bad power transformer
across the street from me. It finally blew up and they replaced
it and the obnoxious whining that apparently only I could hear
went away.

The second involved a crystal vase that would start "humming" at
precisely the same time every night (2:13am) when a freight train
was passing about 7 miles away. I could barely hear the train, but
that **** vase would wake me up every night. I tried moving the vase
around in the house and setting it on different types of material to
dampen the humming, but it just wouldn't go away. I finally took a
baseball bat to the vase - my wife was pretty mad, but at least it
never woke me up again.

I've heard of people complaining about noises that only "they can
hear" and it finally being tracked down to monitors, TVs, fluorescent
light ballasts, air conditioner compressor bearings, and attic vent
fan bearings. Tracking the noise down just took persistence.

Good luck
-- 
Cris Wilson
Information Resource Consultant
College of Architecture, Arts, and Humanities
Clemson University
cris@clemson.edu



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