16 Oct
2013
16 Oct
'13
11:29 a.m.
On Tue, Oct 15, 2013 at 04:41:46PM -0400, Fred Gleason wrote:
On Oct 15, 2013, at 10:11 05, André Garnier Coutinho
wrote:
Good catch. I was thinking of the non-C convention of using log for base 10 and ln for
natural log when I answered.
John
GdB = 20log(Out/In) ?
Close. You actually want:
GdB = 20*log10(out/in)
You probably knew this already as standard mathematical notation assumes log == 'log
to the base of 10'. However, the log() function in the math library will get you
natural logarithms ('log to the base of e'). You want log10(). Been there, done
that confusion myself… :)