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Re: Loudness Calculation

Hi Udaynag,

Try the Sonic Visualiser http://www.sonicvisualiser.org/
developed by the C4DM, Queen Mary, University of London.

together with the Mazurka plug-ins http://sv.mazurka.org.uk/
developed by the CHARM, Royal Holloway, University of London.

Once the Sonic Visualiser is run on your computer, try the smoothed
power output from the PowerCurve plug-in (amongst the Mazurka
plug-ins) for the loudness measurement and see how it works for you.

It works pretty well for measuring loudness in recorded instrumental
chamber music (e.g. piano solo, cello & piano duo etc), but I don't
know whether it has been tested for calculating loudness in speech



Ju-Lee Hong (PhD student)
Department of Music
Goldsmiths, University of London

email: jl.hong@xxxxxxxxxx

On Mon, October 8, 2007 10:52 pm, Udaynag Pisipati said:
> Hi all,
> I need to do some loudness measurements on speech signals recorded
> from a live mobile conversation. Thanks to the loudness code posted
> by Aaron Hastings, from which I could do the loudness evalauation.
> But, I am a
> beginner in psychoacoustics and I am not able to intrepret the
> results or the graphs obatined from the loudness model, especially
> with very few references I have for loudness evaluation. The code is
> implemented using Zwickers ISO532B loudness model. If anybody out
> there could point me to some references , that would really help me.
> The posting from Aaron Hastings
> referes to the Journal of Acoustical Society of Japan (E), 12, 1
> 1991 and it
> would be great if somebody could point me where I could find that
> paper.
> Thanks in advance.
> Udaynag