> >Found that DSP NB performance was greatly improved by
> >setting the roofing filter selection to 20 Khz, and also
> > improved although less so at 6 KHz.
> Which illustrates my previous point that there is
> nothing NR does that turning BW down manually will not do
> (and much faster).
Except for the fact that I was talking about the NB and not NR :-)
To your point, I've come to the conclusion that while you're generally
correct, NR does add to SNR even at very narrow bandwidths. I found in
testing that NR will improve the apparent (S+N)/N ratio around 10dB even at
100 Hz bandwidth. Rough number, but it is bigger that breadbox .. :-)
Grant/NQ5T
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