Subject: Re: equal loudness calculation From: Julian Rohrhuber <rohrhuber(at)UNI-HAMBURG.DE> Date: Mon, 18 Apr 2005 12:18:54 +0200>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(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? >> >> -- >> >> >> >> >> >> >> >> >> . >> -- .