At 12:19 PM -0700 5/31/10, Dan Dugan wrote:
>
>
> > Your test is consistent with Paul D's and I
>> conclusion yesterday that there's a peaky range in the 3032's
>> self-noise circa 3800-4300 Hz-- often in 3-4 very narrow bands. 4022
>> exhibits it too. This is very useful information for me when I mix.
>
>Seems unlikely to me--I can't imagine a mechanism in a mic that
>would generate such an artifact, except perhaps a DC-DC converter,
>which I doubt would be in a 3032 because it's an electret and
>low-voltage. Is that visible in any of the available data plots?
>
>-Dan
Hi Dan--
Artifact? I believe its self-noise and, in my experience, its pretty
common for same model mics to have similar self-noise coloration,
including peaks. Peaks on the order of 3-5 dB are too small for
sonogram tools I own. Paul D. and I separately swept narrow
parametric EQ attenuation across the spectrum and came up with the
same frequency range. I used two different monitor speaker brands
and two types of phones. The soundtracks in both QT movies are full
res if anyone else wants to give it a whirl on their monitoring. Rob
D.
(A) With environmental rumble and 60 Hz background intact:
<http://tinyurl.com/2weeor7>http://tinyurl.com/2weeor7 (4mb)
(B) With <30 Hz brickwall and 60 Hz harmonic filtering applied:
<http://tinyurl.com/37l5oza>http://tinyurl.com/37l5oza (4mb)
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