Subject: Re: f0 frequency difference limen From: Andrew Milne <andymilne@xxxxxxxx> Date: Tue, 13 Jan 2009 14:12:12 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Hi Matt, ----- Original Message ----- From: "Matt Flax" <flatmax@xxxxxxxx> To: <AUDITORY@xxxxxxxx> Sent: Tuesday, January 13, 2009 3:46 PM Subject: Re: f0 frequency difference limen > Hi Andrew, > > I was just chatting with some people the other day about frequency limen > ... > > Are you talking about harmonic instruments ? Yes, I'm principally interested in instruments with harmonic spectra. > Then you can use combinations of even & odd multiples of f0. If you want > to know their nature, I guess it would be dependent on the type of your > instrument and how loud it is being played. I'm not sure how that would work. Essentially I am looking for a ballpark figure that would represent the sort of frequency difference between two "musical tones" that would give a 75% correct hit rate in a 2AFC. And let us assume that the pitches have a reasonable duration - i.e. at least 200ms. Thanks Andrew > > If you are talking about the frequency difference limen associated with > the active processes of hearing ... I am aware of more basic - yet > revealing phenomena - to do with the live Cochlea, SOAEs and (in my > opinion) the SOC. > > Here is a recent reference and my opinion for you ... > > An investigation into the frequency difference limens D_L near SOAE > frequencies suggests that they are reduced around the SOAE frequency > [norena:2002]. They were found to be reduced whether the stimulus was > ipsilaterally or contralaterally presented. Norena et al. argue that the > effect on D_L with contralateral presentation suggests a central role > for the frequency processing and SOAE generation mechanism of the > peripheral hearing circuit. > > I do have more information on the harmonics (and non harmonics) present > in compression driven cochlear sections, however that is a start. > > Matt > > [norena:2002] @xxxxxxxx{norena:2002, > author = {Norena, A. and Micheyl, C. and Durrant, JD and Chery-Croze, > S. and > Collet, L.}, > title = {{Perceptual correlates of neural plasticity related to > spontaneous > otoacoustic emissions?}}, > journal = {Hearing Research}, > year = {2002}, > volume = {171}, > pages = {66--71}, > number = {1}, > publisher = {Elsevier Science} > } > > On Tue, 2009-01-13 at 10:24 +0000, Andrew Milne wrote: > Dear members of the list, >> >> Is there a consensus on the size of the frequency difference limen for > the f0 of complex tones such as those >> produced by musical instruments - i.e. containing both resolved and > unresolved harmonics. References to papers >> describing the precise nature of the tests used would also be helpful. >> >> Many thanks >> >> Andrew Milne >> >> ------------------------------------------------- >> Visit Pipex Business: The homepage for UK Small Businesses >> >> Go to http://www.pipex.co.uk/business-services > > On Tue, Jan 13, 2009 at 10:24:39AM +0000, Andrew Milne wrote: >> Dear members of the list, >> >> Is there a consensus on the size of the frequency difference limen for the f0 of complex tones such as those >> produced by musical instruments - i.e. containing both resolved and unresolved harmonics. References to papers >> describing the precise nature of the tests used would also be helpful. >> >> Many thanks >> >> Andrew Milne >> >> ------------------------------------------------- >> Visit Pipex Business: The homepage for UK Small Businesses >> >> Go to http://www.pipex.co.uk/business-services > > -- > > ,dPYb,,dPYb, I8 > IP'`YbIP'`Yb I8 http://www.flatmaxstudios.com/ > I8 8II8 8I 88888888 http://www.flatmax.org > I8 8'I8 8' I8 > I8 dP I8 dP ,gggg,gg I8 ,ggg,,ggg,,ggg, ,gggg,gg ,gg, ,gg > I8dP I8dP dP" "Y8I I8 ,8" "8P" "8P" "8, dP" "Y8I d8""8b,dP" > I8P I8P i8' ,8I ,I8, I8 8I 8I 8I i8' ,8I dP ,88" > ,d8b,_,d8b,_,d8, ,d8b,d88b,dP 8I 8I Yb,d8, ,d8b,dP ,dP"Y8, > PI8"888P'"Y8P"Y8888P"`Y8P""Y8P' 8I 8I `YP"Y8888P"`Y8" dP" "Y8 > I8 `8, > I8 `8, > I8 8I Public Projects : > I8 8I http://sourceforge.net/search/?type_of_search=soft&words=mffm > I8, ,8' http://www.psysound.org > "Y8P' ------------------------------------------------- Visit Pipex Business: The homepage for UK Small Businesses Go to http://www.pipex.co.uk/business-services