Re: equal loudness calculation

[Julian Rohrhuber <rohrhuber@xxxxxxxxxxxxxx>]

> This is the analitic equation for A-Weighting.
>
> http://www.beis.de/Elektronik/AudioMeasure/WeightingFilters.html#A-Weighting


thank you, this is quite exactly what I was looking for.

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

in this case, I don't want to filter a sound, but simply scale its amplitude.
Or is there a way to make the formula itself efficient by
implementing it as a filter?

> Very efficient !
>
> JJ
>
>
>
> ----- 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?
> >
> >  --
> >
> >
> >
> >
> >
> >
> >
> >
> >  .

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