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Condenser Mics

Subject: Condenser Mics
From: "richpeet" <>
Date: Mon, 10 Jun 2002 21:23:23 -0000
I have now spendt way to much time trying to get up to speed in the 
data given by manufacturers of microphones to figure out what is good 
and what is not, for natural sound.  I am either missing a few 
building blocks in my knowledge or we simply are not given the 
information.  

It seems to me:

1. Sensitivity of a condenser mic is only determined by the after 
element electronics that determine how "hot" the output is and only 
lets you know if you need another preamp that already exsists in all 
condensers.
2. Self noise is not represented as a AC voltage within the audio 
range by any manufacturer and therefore we have no tool to evaluate 
the specs given.
3. db is a bad measure and should be tossed when comparing condensers.

It seems to me what we need is two AC sonographs of the audio 
spectrum, at silence and when the sensitivity is brought to a 
constant output voltage, such as a constant of say 20 mv/pa when 
exposed to a white noise.  The sonograph then needs a 
voltage/frequency view both at the constant full white noise output 
and at the silence levels.

Without something like this I don't have a clue how to evaluate any 
one mic to another.  Am I missing something or are condenser 
microphones currently impossible to evaluate against each other?




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