Re: equal loudness calculation (Jose-Javier Lopez )

Subject: Re: equal loudness calculation
From:    Jose-Javier Lopez  <jjlopez(at)DCOM.UPV.ES>
Date:    Mon, 18 Apr 2005 10:38:43 +0200

This is the analitic equation for A-Weighting.

http://www.beis.de/Elektronik/AudioMeasure/WeightingFilters.html#A-Weighting

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

Very efficient !

JJ



----- Original Message -----
From: "Julian Rohrhuber" <rohrhuber(at)UNI-HAMBURG.DE>
To: <AUDITORY(at)LISTS.MCGILL.CA>
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?
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