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3. Telinga SSM, display noise and more.

Subject: 3. Telinga SSM, display noise and more.
From: "Klas Strandberg" klasstrandberg
Date: Wed Mar 21, 2012 5:53 pm ((PDT))
Thank you Mark, and others, who have contacted me with feed-back and questi=
ons.

I will comment all of it here:

Mark: I agree. It handles thunderstorms (?) and wind amazingly well.
For my personal taste, though, I would prefer a recording to also
have a poor little "tjirrrp" from a poor little titmouse....

Yes, The Telinga SSM (SoundScapeMic) will have a fake fur windshield
as an accessory. I need to make it so that one can have the fur both
outwards and inwards.

Yes, to be packed down in a case, the mics can easily be removed from
the rod. When recording, they can point at different directions, just
as you please.

Yes, it is easy to attach a foam baffle or plate between them, to get
amplitude difference.

There have been postings about radiating displays:
All recorders I know of have a radiating display. It is a matter of
how close the mic's are and cable shielding and probably other
factors. Even Nagra had problems with one of their most professional
models and I heard (true?) that they had supplied a transparent
conductive tape to glue on top of the display.
During my some 40 hours of testing the SoundScapeMic with the Olympus
LS-11, I have had no problems with the display. The recorder has been
in a bag about a foot away from the Olympus.

But I don't think it is right to blame either
Sony/Zoom/Olympus/Tascam as the worst. I think "it depends..."
Plus that I sometimes get a bit annoyed when people say that "there
is no way that I can hear this noise, but if I make a spectrum analysis.."
Please... don=B4t look at a Rembrandt with an x-ray camera.

What I have measured is that the Telinga SSM behaves fine down to
0,5v PIP voltage and 2,2kOhm load in a SPL of 100 db and that I see
no need to make extra boxes to increase the driving voltage.

Today was the first day of real spring here! I recorded between 6am
and 9am and counted five new species for the year - Skylark, Tree
Lark, Chaffinch, Redwing and Mistle Trush.

For the ones who want to know what this day sounded like, there are
three new files at
http://klas.telinga.com/demo

Klas.


At 16:02 2012-03-21, you wrote:
>Hi Klas,
>
>Bravo!
>
>i love the bassy flutterings and this rig captures it amazingly ....
>correct me if i am wrong , but it seems that thunderstorms and wind
>sounds would be appropriate for this set up.The environmental
>ambient is more my interest in nature recording,, so sometimes talk
>of titmouse bore me as much as the gear talk does for the titmouse
>folks.... get that price worked up so those preorders can start
>stacking up on your desk.
>
>Mark
>
>Sent from my iPad
>
>On Mar 21, 2012, at 9:49 AM, Klas Strandberg <> wrote:
>
> > Hello!
> >
> > After my last posting, see below, I have got questions about the new
> > SoundScapeMic and Zoom / Sony Plug in power.
> >
> > Here are my results from measuring and listening:
> >
> > The driving voltage was taken from a variable power supply, filtered
> > by 150 Ohms and 470 mfd to ground, then 2,2 kOhms to the drains of
> > two EM172. The output was connected to the recorder input via a 1 mfd
> > tantalum condenser. The recorders PIP voltage was "off".
> >
> > The mics were placed in front of loudspeaker giving 100db SPL at 440
> > Hz. sine wave.
> > For reference: 100 db SPL and 1v driving voltage =3D 0db output.
> >
> > I could not measure distortion, but the sine wave at the oscilloscope
> > looked fine.
> >
> > Measurements were made at 0,5v / 0,7v / 1v /2v and 3volts.
> >
> > The output from the mics were less than 5 db more at 3v than at 0,5v
> > and the mic self noise followed.
> > Conclusion: Two EM172 give a higher output at a higher driving
> > voltage, but the noise follows the output.
> >
> > So two em172 / channel will work fine on PIP with all modern
> > recorders and there seems is be no need to build extra boxes with
> 9v batteries.
> >
> > Klas
> >
> > As I have posted on the Naturerecordist list a number of times, I
> > have been intensely busy designing a new mic system especially
> > calibrated for SoundScapes. This odyssey began
> > at the 2009 Murie Center Workshop that Bernie, Martyn, and Kevin put
> > together in Wyoming.
> >
> > While the early designs had some spatial and imaging issues, this new
> > system is spot on!
> >
> > Please visit http://klas.telinga.com/demo
> >
> > (All recordings done with Olympus LS-11 on High sens, 8 to 10 on the
> > wheel and 24bit.)
> >
> > Frankly, I love this mic! Main features: It is light-weight, easy to
> > use, small to pack down in a suitcase, not sensitive to wind and
> > handling noise and runs very low noise on PlugInPower.
> >
> > The sound character is big and transparent. Listening to the sound, I
> > lean back and relax, undisturbed by too much of side, harsh or
> > metallic coloring.
> >
> > Sitting in the bush, monitoring with my Beyer headphones, taking the
> > Beyer's on and off, comparing the sound I get from the mics with what
> > I hear with my ears only, - it's the
> > only stereo rig so far that gives me a realistic sound image of wind.
> > I especially love the ambient sounds of the forest. The forest is big
> > and the acoustic imaging is as real as it gets.
> > Hope you enjoy!
> >
> > Klas
> >
> > Telinga Microphones, Botarbo,
> > S-748 96 Tobo, Sweden.
> > Phone & fax int + 295 310 01
> > email: 
> > website: www.telinga.com
> >
> >
> >
> >
>
>
>
>
>
>------------------------------------
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
>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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