Hi Greg and Jez:
Unfortunaetly I'm currently too busy with other things. We have discussed t=
hese noise issues several time here during last few years and I already tri=
ed to explain the theoretical background (http://www.avisoft.com/tutorial_m=
ic_recorder.htm).
To summarize it: For theoretic reasons, it is just impossible to improve th=
e noise performane of a good microphone (lets say a Sennheiser MKH or whate=
ver you like) and a recorder such as a SD 7xx series or even a Fostex FR2-L=
E by adding an additional (even zero-noise) amplifier. Once the noise floor=
of the microphone exceeds the noise floor of the inbuilt preamp of the rec=
order by lets say 10 dB, an additional preamp will make things only worse. =
It would just reduce the available dynamic range (increasing the risk for i=
ntroducing clipping).
Regards,
Raimund
--- In "Jez" <> wrote:
>
> I'd be up for an e-conversation about this subject. I'd be interested to =
know more about the pre-amps you've built too Greg.
>
> on the chat subject: is there a chat room for folks like us anywhere ? if=
not, perhaps....
>
> --- In Gregory O'Drobinak <gmodrobinak@=
> wrote:
> >
> > Raimund:
> >
> > Re-read what Jez said about recording architectural spaces, then maybe =
it will
> > make more sense. Unless you've been there, it is difficult to understan=
d.
> >
> > I am an EE myself and I have built a number of low-noise mic preamps. L=
ooks like
> > I'll be building yet another, soon, for this purpose. I'll probably inc=
lude some
> > charge amps to accommodate the accelerometers I just acquired.
> >
> > If you'd like to continue in the 'extreme amplification' topic, perhaps=
you and
> > Jez & I can correspond off-line.
> >
> > All the best,
> >
> > Greg
> >
> >
> >
> >
> >
> > ________________________________
> > From: Raimund <raimundspecht@>
> > To:
> > Sent: Sat, April 21, 2012 4:50:32 AM
> > Subject: [Nature Recordists] Re: Sanken mics
> >
> >
> > The specifications reports a noise floor of 17dB(A), which is indeed no=
t
> > exceptionally quiet, just mediocre:
> >
> > http://www.sanken-mic.com/en/product/spec.cfm/9.1001000
> >
> > Bye the way, as an (electronics) engineer, I don't understand why folks=
always
> > demand more gain on the recorder. According to my experience and from m=
y
> > perspective, there is no real need for that.
> >
> > Regards,
> > Raimund
> >
> > --- In "Jez" <tempjez@> wrote:
> > >
> > > now i'm puzzled too - according to the specs on the Sanken site its v=
ery quiet
> > >+ my first test with it also confirms that. What is it in the specs th=
at makes
> > >you think its not too quiet ?
> > >
> > > my motivation in terms of looking at Sanken was because i've never he=
ard
> > >anything negative about their mics.
> > >
> > > ta.
> > >
> > > --- In Gregory O'Drobinak <gmodrobi=
nak@>
> > >wrote:
> > > >
> > > > Jez:
> > > >
> > > > According to the specs, this is not a particularly quiet mic.
> > > > What was your motivation for buying it?
> > > >
> > > > Just curious,
> > > >
> > > > Greg
> >
> >
> >
> >
> >
>
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