What is the "Equivalent Input Noise" equivalent to?
JC
--- In Dan Dugan <> wrote:
>
> It isn't equivalent to anything, it's just the mic output noise!
>
> -Dan
>
> On Dec 20, 2012, at 9:23 AM, John Crockett wrote:
>
> > Would "Equivalent Output Noise" or EON do the trick?
> >
> > John
> >
> > --- In Dan Dugan <dan@> wrote:
> >>
> >>> In an attempt to make my calculations a little clearer and more usefu=
l, I made some changes to the spreadsheet.
> >>
> >> This is very useful, John, thank you.
> >>
> >> I quibble with the use of one term. "EIN" refers to the "equivalent in=
put noise" of the preamp. Therefore it should not be used for the noise con=
tributed by the microphone. I don't think there's a standard term for the o=
utput level of the mic's self-noise, ordinarily quoted in terms of equivale=
nt SPL. It's a useful figure, though, and perhaps we should invent a term f=
or it. Self-noise output?
> >>
> >> Missing from your calculations is the loading effect of the input impe=
dance of the preamp on the output impedance of the mic. Either or both may =
not be flat in the frequency domain. Let's not go there for now!
> >>
> >> -Dan
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > "While a picture is worth a thousand words, a
> > sound is worth a thousand pictures." R. Murray Schafer via Bernie Kraus=
e.
> >
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> >
> >
> >
>
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