Distorsion percentage, power or voltage?
Hi,
In message , gecwhite
writes
The twenty comes in because the "voltage dB" is essentially derived from
the "power dB," but power is a non-linear function (square law) of
voltage.
Yes, I got that; I just needed to know which came first :-)
By _Bell System Blue Book definition_:
X(dB) = 10*log(P/P_ref)
*That's* what I was looking for; many thanks. Is the Bell System Blue
book available? Call it sad academic interest.
[Much good stuff snipped to the clipboard for later]
I hope this clears up some of your questions.
All of them. Thanks very much.
--
Regards,
Glenn Booth
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