• Re: Altitude ("high" listening room) vs. SPL - Inmate51 15:28:51 01/21/06 (0)
  In Reply to: Altitude ("high" listening room) vs. SPL posted by emrickl on January 19, 2006 at 05:36:47:

  The attenuation of sound in air is influenced by both humidity and atmospheric pressure, and is frequency dependent. Higher frequencies are affected more than lower frequencies. This is unrelated to the load which is presented to the driver, which is an entirely different issue.

  Bottom line: you'll have to turn up the treble. Where do you live?
  (Please say "in the Alps"!)
  
  
  

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• Re: Altitude ("high" listening room) vs. SPL - David Aiken 21:06:14 01/19/06 (1)
  In Reply to: Altitude ("high" listening room) vs. SPL posted by emrickl on January 19, 2006 at 05:36:47:

  Search Stereophile's web site. I've seen something written by John Atkinson discussing this issue but I can't remember where. It may have been in the 3 part article he wrote on speaker testing.

  Whatever it was, I'm sure it was on-line.

  David Aiken
  
  

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  • Re: Altitude ("high" listening room) vs. SPL - emrickl 04:21:39 01/21/06 (0)
    In Reply to: Re: Altitude ("high" listening room) vs. SPL posted by David Aiken on January 19, 2006 at 21:06:14:

    You were right, David - thanks:

    http://www.stereophile.com/asweseeit/590awsi/index.html

    John Atkinson, May, 1990:
    "As might seem intuitively obvious, all speakers get quieter with altitude, conventional moving-coil woofers and tweeters pretty much in direct proportion and planars by an amount which will vary with frequency and with the exact ratio between their own diaphragm mass and the air load."
    
    

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