From: dpierce@cartchunk.org   
      
   Audio Empire wrote:   
   > Also, generally speaking, electret microphones don't have the specs of   
   > conventional condensers. Most are very shy on bass, most aren't as quiet as   
   > non-electret condenser mikes, nor will they handle as high SPLs.   
      
   If you're talking about the $4 Panasonic electret capsules   
   of the same as found in cheap telephones and the like, maybe.   
      
   But consider the Bruel & Kjaer models 4129, 4155, 4176 tha exhibit   
   free field response down to 4-6 Hz, with noise floors of less   
   than 15 db(A) SPL, 3% distprtion limit of of 142 dB SPL   
      
   > I don't believe that there is any real technical reason for this,   
      
   Therr isn't, that's why it's not true.   
      
   > I think it's more because electrets make up the bottom end of   
    > the condenser microphone price range.   
      
   THe above examples illustrate that they are not limited to the   
   bottom end of the market.   
      
   > Also, I don't know about today, but early electret microphones were   
   > subject to losing their electret charge under adverse conditions of   
    > heat and humidity.   
      
   That's true of ALL electrets: just like magnets, exceed a certain   
   temperature and they loose their polarization.   
      
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