To the Group: I am including (what I think is) a working matlab program for the calculation of loudness according to DIN45631 / ISO 532 B. It reads a sound from a wav file, calibrates the data, filters it into 1/3 OBs, and then calculates Loudness and Specific Loudness. To anyone interested: A while back I asked for some help on putting together a loudness program in matlab. Several people were very helpful and I want to offer my thanks to everyone for their input. Here is what I have. It seems to work, but I would be interested in anyone's feedback. Some notes: The Oct3dsgn function is not mine. I got it from the matlab site. My Loudness code is a conversion of the BASIC code found in J. Acoust. Soc Jpn (E) 12, 1 (1991). I had tried an older program found in JASA, but I think its tables were a little old so I couldn't get the right value for standard signals. Finally, I had to mess with the 1/3 OB filters to get the poles to be stable so you might want to check to make sure what I did there is reasonable. Thanks for any comments Aaron
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DIN 45631 Complete App Version 1.1.zip
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