Martyn, I hear you! But lots of people are spending money on mic's with
TOO LOW OUTPUT! Not only people on this list!
And when people discuss which microphone to buy, I never hear (seldom) a
word about the output voltage.
People, especially beginners, with consumer machines - look on the wrong
figures for a naturesoundrecordist. They look at the figures as IF THEY
WERE STUDIO recordists. OR: As IF they had a professional recorder or
professional mic preamp.
All I'm saying on and on: THERE IS ALREADY a microphone amplifier in a
(condensor) microphone. Two things are important: The self noise of the
membrane / integrated mic amp AND!!!! the gain of this integrated mic amp.
If the gain is too low - the noise of the consumer recorder will take over.=
Then it doesn't matter what noise figures that the microphone has!!!!!!
It is a fact!!!
After a while (and with help from Rob) it seems as if people understand.
Then it comes again: "Which microphone shall I buy" and the discussion is
on again. Same discussions as before - without consideration of the output=
voltage, but full of reasoning which doesn't mean much to a naturesound
recordist.
I am trying to simplify as much as I can and stay on track. I don't know
why there is such a need to complicate things.
My fault though - I tried to see if anybody had a good way to determine how=
much v/Pa one must look for. Where the borderline is. Perhaps that
discussion is too difficult. But it is damned important!
Klas.
At 20:37 2005-09-03, you wrote:
>I have had a few complaints from people that this list is becoming the mic
>builders list, a few have unsubscribed until it gets back to what was
>intended to be "Nature Recording"
>
>Please keep ON subject....
>
>Martyn
>
>****************************************
>Martyn Stewart
>Bird and Animal Sounds Digitally Recorded at:
>http://www.naturesound.org
>Redmond. Washington. USA
>N47.65543 W121.98428
>
>e-mail:
>Tel: 425-898-0462
>
>Make every Garden a wildlife Habitat!
>*****************************************
>
>
>-----Original Message-----
>From:
> On Behalf Of Rob Danielson
>Sent: Saturday, September 03, 2005 11:03 AM
>To:
>Subject: Re: [Nature Recordists] Mic attenuation on purpose (was Min mV/Pa=
4
>MD..
>
>Hi Mike-- Thanks for your thoughts. Methinks this is getting too
>technical for the list. Let me know, off list, if its okay for me to
>follow-up, off list. Rob D. <>
>
> =3D =3D =3D
>
>At 12:33 PM -0500 9/3/05, Mike Feldman wrote:
> >Rob Danielson wrote:
> >
> >>... I'm looking into the
> >> nature of small circuit built into the unbalanced, 3.5mm cable that
> >> Rode provides with the NT-4. I've by-passed the circuit in my NT-4
> >> cable and mic output jumped up 12dB-- the same dB drop in output (and
> >> increase in noise)...
> >> I'm waiting to recommend the simple cable modification until I can
> >> figure out if there are bad consequences I've not grasped. Here's
> >> what I think** the circuit is should anyone have ideas:
> >> http://www.uwm.edu/~type/Mic%20Preamps/NT-4ConnectorCircuit&ModSm.jpg
> >
> >If I'm reading your drawing correctly, you're shorting the series
> >resistor of the pad, but not opening the parallel resistor. So there
> >would still be some attenuation dependent on the input impedance of
> >the sink.
> >
> >> **umashankar mantravadi, who is on this list, has commented on the
> >> micbuilders list that my circuit drawing looks more like line to mic
> >> pad, which, I assume, would have much greater attentuation than
> >> -12dB. Maybe the four tiny components on the pcb are not simple 10K
> >> resistors, as labeled and measured? I dunno. I think I have the basic
> >> circuit structure right though. Rob D.
> >
> >Sure looks like an L-pad. You mentioned earlier they're labeled EDI
> >on the pcb ... "Electrostatic Discharge" current limiter perhaps?
>
>--
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>
>
>"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:
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