Measure pad 3 to pad 1 note the resistance, sort pairs that match to within=
0.1R or better.
Confirm selection in a 94 dB calibrator once the leads are attached.
-M
--- In "rock_scallop" <> w=
rote:
>
> Hi Anders,
> I am not sure what the best or easiest way is but this is what I did to m=
ake pairs from ten em172 capsules - the capsules came with leads already so=
ldered on.
>
> Number each capsule with a marker to keep them straight.
> Make a test fixture - stereo cable with screw terminals to easily swap ou=
t capsules.
> Record a stereo recording of each EM172 capsule beside a single reference=
capsule. In this case for the reference capsule I used an EM158 I had lyin=
g around.
> Open each recording in your audio editing software (I used Adobe Audition=
1.5), run a frequency analysis of a section of each, copy the data to the =
clipboard, and paste it into a spreadsheet (I used MS Excel.) You may need =
to adjust the frequency analysis resolution to limit frequency divisions to=
a manageable number of data points. I do not know if "copy to clipboard" i=
s a common feature with other editing or analysis software.
> In the spreadsheet, subtract the left (reference) channel from the right =
(EM172) of each set to find the differences in frequency response.
> Plot the points to make a graph showing the differences from reference of=
all ten capsules, and use that to decide the best pairing.
>
> It will be interesting to hear how others have done it.
>
> John Hartog
> oregonsoundscapes.com
>
> --- In "kronseth" <anderslangstrand@> w=
rote:
> >
> > Hi everyone!
> > Sorry if/that this question has been raised probably infinite times.. S=
o I have received a batch of electrets, both omnis and cardioids.
> > The ones I have bought before have come in matched pairs, but this time=
I=C2=B4ll have to do it myself.
> > I understand there a quite a few ways of doing it. Anyone has a preferr=
ed method?
> >
> > Best
> > -Anders
> >
>
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