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

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