>
>As I understand it, signal to noise is based on -94 dB, 1 kHz at 1 Pa
>so a mics self noise is the difference between this and the rating
>for the 853: -67 dB, 1 kHz at 1 Pa or 27dBA.
Yes, and filtered through a defined (A)-weight filter to compensate for the=
human ear's different sensitivity for different frequencies . CCIR is the
same measurement, but with another filter.
My spontaneous reaction is that you can't use a 27 dbA noisy microphone for=
naturesound recording, except perhaps in a parabol. I'm certain that it is=
microphone noise which is heard on the recordings.
Klas.
> >
> >>> Possibly unrelated question - on the indoor recording I got
> >>>a 20 db spike above the hiss at 8200 hz which I did not hear at the
> >>>time. It only became obvious when I filtered the hiss out and
> >>>boosted the treble. Could this be some kind of mic feedback noise
> >>>(the two mics were pretty close together and within each other's
> >>>polar pattern)? It was present during the entire recording.
> >>
> >>Sounds like low batteries, check condition? Rob D.
> >
> > The rechargeable battery was at 2/3 so I put on the AA
> >booster with a fresh battery. I ran the unit for a couple of hours
> >*after* the recording, so I'm pretty sure the batteries were good.
> >
> > -- Chuck
> >
> > PS: does anyone know the noise specs for the MD-DR7?
>
>I've never encountered mic input noise specs given for Sony or Sharp.
>The Sharp manual (like most MD's) is in the minidisc community archive
>http://www.google.com/url?sa=3DU&start=3D1&q=3Dhttp://www.minidisc.org/man=
uals/sharp/sharp_mddr470.pdf&e=3D10053
>
>Maybe try other mics to see if the spike goes away or changes? Rob D.
>
> >
> >
> >=3D=3D=3D=3D=3D=3D=3D=3D
> >Chuck Bragg, Pacific Palisades, CA
> >Membership, Newsletter, Web manager
> >Santa Monica Bay Audubon Society
> >www.smbas.org
> >=3D=3D=3D=3D=3D=3D=3D=3D
> >
> >[Non-text portions of this message have been removed]
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>
>--
>Rob Danielson
>Film Department
>University of Wisconsin-Milwaukee
>
>
>
>"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:
________________________________________________________________________
________________________________________________________________________
"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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