Topband: cw pitch

Tree tree at
Wed Nov 29 19:16:59 EST 2006

On Wed, Nov 29, 2006 at 12:08:52PM -0500, Jim Jarvis wrote:

> First, the brain needs a fair statistical 
> sample of the noise, to be able to hear things against it.
> A narrower filter may not provide enough noise input for
> effective 'cancellation'.  Not the right word...may be
> 'selection' or 'differentiation'...but you get the idea.

This is a great explanation for why EME is better with SSB filters
than narrow ones.

There are a couple of samples of EME signals on this page that might
be interesting for some to listen to.  If you are "trained" at hearing
weak signals, you should hear them FB.  Untrained ears take awhile to
finally get it.

Tree N6TR

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