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Re: equal loudness calculation

This is the analitic equation for A-Weighting.


Just, pass it to Z domain and use "a" and "b" coef. in a IIR filter.

Very efficient !


----- Original Message -----
From: "Julian Rohrhuber" <rohrhuber@xxxxxxxxxxxxxx>
To: <AUDITORY@xxxxxxxxxxxxxxx>
Sent: Tuesday, April 12, 2005 4:25 PM
Subject: [AUDITORY] equal loudness calculation

I'm looking for a computationally efficient way to do a frequency
dependent amplitude compensation. The emphasis is much less accuracy
(especially not for different loudness levels) but more a reasonable
approximation - maybe a polynomial.

Any hints?