I did a three-way comparison with the AT825 (the balanced version of
the same mic), a Shure VP88 and a pair of Schopes with CMC-6
multipattern capsules. The AT was the noisiest, followed by the VP88.
The Schopes were the quietest by a rather wide margin. All three mics
were connected to the same pre-amp, a Mackie MS1202 mixer, and I
recorded a quiet pocket watch ticking. Then I normalized all the
example files so that the watch ticks reached the same peak level and
compared the noise floor in each recording.
rudy
>
>Message: 7
> Date: Sun, 28 Jul 2002 23:13:53 -0000
> From: "bbystrek" <>
>Subject: AT822 Microphone Noise Floor
>
>Does anyone have any experience with the Audio Technica AT822 stereo
>condenser mic? How does it stack up against other mics in terms of
>background noise? It's the only mic I own and I don't really have
>much perspective. I was pleased with the results recording frogs and
>various water sounds this past spring. It seems a little tricker to
>capture lower level sounds like a meadow of insects. Close miking
>helps improve signal relative to noise, but this can also throw
>things out of perspective where I'm really trying to capture a
>broader image.
>
>Datasheet: http://www.audiotechnica.com/prodpro/profiles/AT822.html
>
>Open Circuit Sensitivity: -45 dB (5.6 mV) re 1V at 1 Pa
>Signal to Noise Ratio: 70 dB, 1 kHz at 1 Pa
>
>Reading various manufacturers datasheets and app notes, it appears
>that quiet recordings at low SPLs are related to both Sensitivity and
>SNR. How does one compare two mics, when neither value is equal? Is
>it always subjective?
>
>Another reason I'm asking about noise - I'm thinking of getting into
>one of the more robust stereo imaging techniques like M-S or
>boundry.
>
>By the way, I'm recording with a Sony walkman style DAT, and
>presently editing with Magix's Samplitude on a 90 day demo basis. My
>objective is for playback via CD and loudspeakers and of couse for
>optimal imaging, using headphones.
>
>Brian Bystrek
>
>
--
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* ... http://www.trubitt.com *
*--------------------------------------------------*
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>From Tue Mar 8 18:22:34 2005
Message: 24
Date: Tue, 30 Jul 2002 17:41:26 -0700
From: KACastelein and DJLauten <>
Subject: spectral wave form
Folks,
Sorry if this seems simple, but how does one save the spectral wave form
image so that one can send it to another to see? IE., I want to send a
picture of the spectral wave form of a Sporophila to a friend, instead
of sending him the actual wave file. How do I take a "picture" of the
image on my screen? I am using Cool Edit 2000, Windows ME. Thanks
Dave Lauten
Bandon OR
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