I have not tested the two side-by-side. You have to expose them both for
the same sound pressure, say 1pa and then measure the output voltage,
without load.
They are so different, I'm not even sure that your version off EM23 has a
low impedance output.
I don't thing it is meaningful to compare them.
Your observation on the noise spectrum is interesting, though. I have
claimed a few times that EM23 has a "soft noise which often is masked by
the overall atmo noise" but I have never had any proof for that statement.
Klas.
At 12:14 2006-09-03, you wrote:
>Yes, exactly. But I don't know if the roll-off in the noise is
>related with an overall roll-off of the frequency response of the
>electronics inside the box. I should check with a high-frequency source.
>In my test the EM23 is more sensitive than the NT1A, but somewhere I
>read that the EM23 should be less sensitive... Any comment about this ?
>
>Gianni
>
>At 03.18 03/09/2006, you wrote:
>
> >At 23:58 2006-09-02, you wrote:
> > >At 12.41 02/09/2006, you wrote:
> > > > >...snip...
> > > > >
> > > > >The EM23s appear to be 4.5dB more sensitive than the Rodes.
> > > > >The AKG appear to be 2.5dB more sensitive than the Rodes.
> > > > >Then I analyzed the recording in the spectrum window of Adobe
> > > > >Audition 2.0 with a large FFT size (65536) and by averaging across
> > > > >few seconds of recording.
> > > > >
> > > > >After compensating for the different sensitivities, at 12kHz I get=
a
> > > > >noise level of -112 with the Rodes, -101dB with the EM23 and -97dB
> > > > >with the AKG. But a significative difference is that the noise flo=
or
> > > > >is flat for the AKG and Rodes, while in the EM23 is not flat: -96d=
B
> > > > >at 6 kHz and -110 at 40 kHz.
> > > >
> > > >I'm not sure that I understand....
> > > >
> > > >Klas.
> > >
> > >To compare the recordings I normalized all to a same arbitrary peak
> > >level (-6dB); this way all recordings have been processed. Then I
> > >simply made the global spectra of each of them and overlaid all the
> > >graphs. On the graphs I see the noise plateau of each recording. The
> > >EM23 don't have the traditional white noise floor of many mics, but
> > >something more similar to a pink noise.
> > >Klas, I'll send you the graph privately.
> > >Gianni
> >
> >So what you mean is that the EM23 has a "softer" or "smoother"
> >noise? Less HF??
> >
> >Klas.
> >
> > >----------------------------------------------------------
> > >Gianni Pavan
> > >Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
> > >Universita' degli Studi di Pavia
> > >Via Taramelli 24, 27100 PAVIA, ITALIA
> > >Tel +39-0382-987874
> > >Fax +39-02-700-32921
> > >Web <http://www.unipv.it/cibra>http://www.unipv.it/cibra
> > >Email <gpavan%40cibra.unipv.it>
> > <gianni.pavan%40unipv.it>
> > >
> > >
> > >
> > >"Microphones are not ears,
> > >Loudspeakers are not birds,
> > >A listening room is not nature."
> > >Klas Strandberg
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >Telinga Microphones, Botarbo,
> >S-748 96 Tobo, Sweden.
> >Phone & fax int + 295 310 01
> >email: <telinga%40bahnhof.se>
> >website: www.telinga.com
> >
> >
> >
>
>--------------------------------------------------------------
>Gianni Pavan
>Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
>Universita' degli Studi di Pavia
>Via Taramelli 24, 27100 PAVIA, ITALIA
>Tel +39-0382-987874
>Fax +39-02-700-32921
>Web http://www.unipv.it/cibra
>Email
>
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
website: www.telinga.com
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