sound meter

Sat Apr 24 07:35:52 AKDT 2004

My radio shack soundmeter was off by almost 3 dB when it was calibrated. 

        Del
  ----- Original Message ----- 
  From: Earl Haury 
  To: discussion at nsrca.org 
  Sent: Saturday, April 24, 2004 9:05 AM
  Subject: Re: sound meter

  Steve

  It matters a lot. The rules specify dB-A, so use the A scale. Without a calibrator most sound meters, even the expensive variety, are really only good for comparative measurements. So - use it to find what makes the airplane quieter but don't get fixated on the absolute number without a calibrated reference.

  Earl
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