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Re: Af0 frequency difference limen

I suppose Jim is correct and we should always mention the f0 where the DL was measured.

Your posts made me reread my paper, and indeed the DL were smaller than 0.5%. They were for complex tones 0.36% for F0=100Hz, and 0.19% for F0=250Hz (cut frequency of the high pass 1 kHz, no low-pass masker). This is in accordance with what has been reported in the literature. Pure tone DL were much higher (0.43% for 250 Hz, 0.89% for 100 Hz). I suppose that F0 frequencies below 1kHz are quite relevant to music so that relatively high DLs (>0.1% for complex tones) should be taken into account when dealing with music.


Date:    Wed, 14 Jan 2009 16:14:37 -0600
From:    "James W. Beauchamp" <jwbeauch@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: f0 frequency difference limen

In terms of musical intervals, 0.2% for partials, 0.1% for the F0
translates into 3.4 and 1.7 cents, respectively, where 100 cents
corresponds to an equal-tempered semitone change of pitch.

I wouldn't think that this result would be completely independent
of F0. I would expect the percentage threshold to increase for
F0s below a certain point. It would also depend on the spectrum.
I.e., spectra with just a few partials in the bass region may
have much larger DLs. But 2 cents is a good practical df to
shoot for in any music synthesis system.


Prof. Dr. Christian Kaernbach
Allgemeine Psychologie
Institut für Psychologie
Christian-Albrechts-Universität zu Kiel
Olshausenstr. 62
D-24098 Kiel