Re: dB SPL to dBA (Patrick Susini )

Subject: Re: dB SPL to dBA
From:    Patrick Susini  <Patrick.Susini(at)IRCAM.FR>
Date:    Wed, 20 May 1998 16:56:42 +0200

An approximation can be obtained for dBA as follow

function [y] =3D pondBA(n,fs)

%FUNCTION [y] =3D 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=3D[1:1:n];
x=3D(fs/2)/n*i;
x=3Dlog10(x);
y =3D -184.786441+160.661125*x.=D81-55.73236*x.=D82+10.073034*x.=D83-0.83=
4527*
x.=D84;%en dB


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

susini(at)ircam.fr   http://www.ircam.fr/

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