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Re: dB SPL to dBA



An approximation can be obtained for dBA as follow

function [y] = pondBA(n,fs)

%FUNCTION [y] = pondBA(n,fs)
%
%Calcul la ponderation dB(A) en dB
%n : nombre de points (c-a-d la resolution frequentielle)
%fs : frequence d'echantillonnage
%

i=[1:1:n];
x=(fs/2)/n*i;
x=log10(x);
y = -184.786441+160.661125*x.1-55.73236*x.2+10.073034*x.3-0.834527*
x.4;%en dB


--
Patrick SUSINI
Equipe Perception et Cognition Musicale
IRCAM, 1 place Igor-Stravinsky, F-75004 Paris, France

susini@ircam.fr   http://www.ircam.fr/

tel: (33 1) 4478-1552 (bureau), (33 1) 4478-4862 (labo)
fax: (33 1) 4478-1540