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Summary: [Nature Recordists] Re: EIN values and bits and peaks

Subject: Summary: [Nature Recordists] Re: EIN values and bits and peaks
From: "rock_scallop" rock_scallop
Date: Sun Dec 16, 2012 12:04 pm ((PST))
Klas, Raimund, and others:

Could the variability in sensitivity between Telinga SSM microphones be a f=
actor?

Variably between stock EM172 capsules sensitivity(+ or - 3dB) would certain=
ly exhibit noticeable differences in the range of recorder EIN we are talki=
ng about.
Also, could stated em172 variability in impedance (+ or - 30%)play any role=
 in noise differences between different setups? I don't know anything about=
 that.

EM172 spec sheet:
http://www.frogloggers.com/Documents/EM172.pdf?cat=3D13&en=3D1

John Hartog
rockscallop.org



--- In  "Raimund" <> wrot=
e:
>
> > Example: A client of mine (reporter) had fallen in love with the
> > sound and use of the old Sennheiser MD21. He had tried it with LS10,
> > a Tascam and a Zoom recorder, but got far too much noise. However, it
> > worked just fine with the Sony D50. And this was NOT a matter of 4-5
> > db, caused by EIN differences.
>
> Hi Klas,
>
> Are you sure that this was not a matter of EIN differences? At least the =
diffence between the Sony D50 and the Zoom H2 for instance is huge (-126 vs=
 -99 dBu).
>
> > 90% of all Sony D10 users get a audibly lower self noise when using
> > the Telinga Clip-On's, compared to the built in mics. But some 10% does=
n't.
> > Why?
>
> I can only speculate here. My guess would be that it has something to do =
with the PIP power. As we have discussed earlier, powering two EM 172 capsu=
les on each channel of the Sony M10 might cause a drop of the supply voltag=
e (measured at the mics) below a critical value. Due to tolerances between =
the individual capsules, it might work fine in most cases, but perhaps not =
in others.
>
> > The by far noisiest recording that I have heard with the Telinga SSM,
> > were made with a Nagra digital recorder.
> > Why?
>
> I never had my hands on a Nagra recorder. So, I don't know.
>
> Regards.
> Raimund
>








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