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Need help about a filtter question

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hch16550

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Dears,
I want to know the mean as following

1.c-message weighting or c-notch
2.psophometric weighting(p-weighting) p-notch

Some can tell me? where can i found the data?


Thank you.

hch16550
 

flatulent

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ear response

These curves are similar to the human ear's response to noise. Filtering telephone channel noise through them before measuring the noise output is a better predictor of perceived noise than measuring the channel.

http://ftp.tiaonline.org/tr-41/tr4135/Public/TR41.3.5-ArchivesForContibutionsAndDocuments/TR41.3.5-00-11-050P%20-%20470.110-C%20-%20Acoustics%20Draft%2000%20(103000).pdf

is a document that has these curves on page 20 or so. (Actually the points of the curve in table format.
 

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