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Re: Can't measure ALL pink noise with "A" weighting

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bstan

(A)

In Reply to: Can't measure pink noise and compensate for meter... posted by lwang on January 06, 2002 at 11:16:35:

But you can't accurately measure the pink noise SPL below 500Hz with the "A" weighting on the SPL meter, because the "A" weighting response sensitivity drops off substantially below 500Hz.
How do you correct for that?
bstan

Follow Ups:

RS meter tweaks - bmar 19:46:47 01/08/02 (5)
This gentleman has done some work with RS spl meter's.
Perhaps it is of help.
http://www.gti.net/wallin/
Bill
- http://www.gti.net/wallin/
- Re: RS meter tweaks - bstan 23:42:53 01/08/02 (4)
  Thanks,
  Yes, I have built the calibrated mic-wand and a battery operated mic-preamp displayed on that site and they work quite well.
  The mods to the RS SPL meter are designed to correct the response curve for the "C" weighted curve which does measure below 500Hz, but the "A" weighted curve still doesn't measure below 500Hz.
  bstan
  - Re: RS meter tweaks - bmar 16:02:59 01/09/02 (3)
    I'm looking at getting a Behringer DSP 8024 analyzer. might be a ok measuring device with the ability to make some system changes.
    Bill
    - http://www.behringer.com/eng/products/digitalprocessors/dsp8024.htm
    - Re: RS meter tweaks - bstan 17:10:34 01/09/02 (2)
      Yes, it gets pretty good comments here, but if you are using it to eliminate room peaks in the subwoofer range, just be aware it is limited to only a few parametric EQ filters, unlike the BFD-1124 which provides for 12 filters per channel.
      bstan
      - Re: RS meter tweaks - bmar 21:08:49 01/09/02 (1)
        
        In Reply to: Re: RS meter tweaks posted by bstan on January 09, 2002 at 17:10:34:
        
        ok, I give. I cant find info for a BFD-1124 anywhere.
        regards,
        Bill
        although bfd.com has a pretty cool web page (very off topic)
        
        replaces BFD 1100 - bstan 09:05:58 01/10/02 (0)
        
        In Reply to: Re: RS meter tweaks posted by bmar on January 09, 2002 at 21:08:49:
        
        It is currently being sold as the replacement for the BFD 1100, Behringer just hasn't upgraded their webpage yet for the 1124.
        Maybe this is a first! Instead of vaporware we have webvapor.
        bstan
I have no disagreement about "A" weighing (nt) - lwang 11:58:47 01/06/02 (0)

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