Re: Equal-Loudness-Level Contour Signal (ISO 226)

[Christopher Hummersone <c.hummersone@xxxxxxxxxxxx>]

See also: http://www.mathworks.com/matlabcentral/fileexchange/50348-iso-226-2003-normal-equal-loudness-level-contours

This version returns SPLs at arbitrary frequencies (via piecewise cubic interpolation) and/or arrays of loudness levels. So in Matlab you can simply run:

phons = 20:10:80;
[spl,f] = iso226(phons,[],true);
figure; semilogx(f,spl)

Chris

On 7 Apr 2015, at 06:21, Richard F. Lyon <dicklyon@xxxxxxx> wrote:

Here is the ISO 226 code you seek:
http://www.mathworks.com/matlabcentral/fileexchange/7028-iso-226-equal-loudness-level-contour-signal

On Mon, Apr 6, 2015 at 3:07 PM, Fernando A. Marengo Rodriguez <fmarengo@xxxxxxxxxxxxxxxxxxxx> wrote:

Dear list,

I would like to draw (for any value of loudness) the equal loudness level contour signals mentioned in ISO 226. Is there any mathematical _expression_ for generating such curves in a PC? Otherwise, what other options do you recommend for their computer simulation?

Thank you very much in advance.

Kind regards,

Fernando A. Marengo Rodriguez, Dr. Ing.
- Universidad Nacional de Rosario, Argentina
- Laboratório de Pesquisas em Processamento Digital de Sinais
Universidade Federal de Santa Catarina, Brasil