[LAD] sound dissipation in air - formulas and filters?

2009-01-30 Thread Jörn Nettingsmeier
hi everybody! does anyone know a way to compute filters that simulate air dissipation for a given temperature and humidity? so far, all i've found is an online calculator at http://www.sengpielaudio.com/calculator-air.htm, but the javascript in there is not exactly fit for citation :) plus i kno

Re: [LAD] sound dissipation in air - formulas and filters?

2009-01-30 Thread victor
you can try using a bank of equaliser filters in parallel? The Regalia and Mitra design ("Tunable Digital Frequency Response Equalization Filters", IEEE Trans. on Ac., Sp. and Sig Proc., 35 (1), 1987) works quite well. Victor - Original Message - From: "Jörn Nettingsmeier" To: "The Linux

Re: [LAD] sound dissipation in air - formulas and filters?

2009-01-30 Thread Fons Adriaensen
On Fri, Jan 30, 2009 at 09:15:10PM +0100, Jörn Nettingsmeier wrote: > so far, all i've found is an online calculator at > http://www.sengpielaudio.com/calculator-air.htm, but the javascript in > there is not exactly fit for citation :) > plus i know there is a standard (ISO 9613-1:1993) that deals