Subject: Re: Equal-Loudness-Level Contour Signal (ISO 226) From: Jont Allen <jontalle@xxxxxxxx> Date: Tue, 7 Apr 2015 07:49:10 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Fernando, The method for doing this calculation may be found in the following paper: Allen, Jont B. and Neely, S. T. (1997) "Modeling the relation between the intensity JND and loudness for pure tones and wide--band noise"; /J. Acoust. Soc. Am.,/ *102* (6) pp 3628--3646 http://auditorymodels.org/GEAR/Djvu/Allen/AllenNeely97.pdf Somewhere I have a matlab code that does this calculation, but I would need to look for it. The theory is discussed in: Allen, Jont B. (1996) "Harvey Fletcher's role in the creation of communication acoustics"; /J. Acoust. Soc. Am.,/ *99* (4) pp 1825--1839, April http://auditorymodels.org/GEAR/Djvu/Allen/Allen96.pdf You need to be careful to note if your looking for freefield, or under headphones. They are very different things. Jont Allen On 04/07/2015 12:21 AM, Richard F. Lyon 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@xxxxxxxx <mailto:fmarengo@xxxxxxxx>> > 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 <http://www.unr.edu.ar/>, Argentina > -Laboratório de Pesquisas em Processamento Digital de Sinais > <http://www.lpds.ufsc.br/>Universidade Federal de Santa Catarina <http://ufsc.br/>, Brasil > >