homeplug

[Alma J Wetzker]

Man-wai Chang wrote:
>> Now, if your ears were electronic circuits and you could put a
>> bandpass filter in that could only distinguish her frequency, even if
>> the guy in front of you were shouting, you'd only hear her (that is
>> until the ambient noise simply rose above her soft voice).
> 
> 
> But homeplug is not a wireless technology right? The adaptor is to 
> listen to the wire, not the radiation out of the wire, right?
> 
> Your blonde and guy thing was about frequencies and amplitude. I still 
> remember a bit of wave theories... hopefully,. It's been over a decade 
> since I read my A-Level Physics.

The same principles apply to wires.  The way they are made, shielded, 
unshielded, twisted pair, coax, etc., are very significant in what they 
can do with a signal.  If you have power on the line (the guy right in 
front of you talking really loud) you can still "hear" high frequency 
noise (the blonde) on the line.  The problem is, what else on the power 
line will be affected by the blonde, and, if you are trying to listen to 
the blonde, what types of noise will interfere.

It still comes back to; saying a wire, is a wire, is a wire, is not a 
true statement.

     -- Alma