On Sun, 15 Jul 2007 12:11:13 -0400 "Chuckk Hubbard" <[EMAIL PROTECTED]> wrote:
> Howdy, Andy. > Another interesting effect (don't remember what they call it) is that at > certain high frequencies, subjects tend to report that the frequency changes > as the volume changes, when in reality the volume is all that changes. Hmm, > I bet there was a way to say that with half as many words... > But regardless, I would personally never touch this phenomenon in my own > experiments, it's just too slippery. Wow...that is very interesting! I never heard of that effect. Anyone got clues to experimental data? > > -Chuckk > > On 7/14/07, Andy Farnell <[EMAIL PROTECTED]> wrote: > > > > > > > > One thing you might like to look at is the Fletcher Munsen curve. There > > isn't a > > hard mathematical relationship between perceived amplitude (loudness) and > > frequency, it's more of a biological and psychoacoustic effect, and > > somewhat > > subjective between listeners. > > > > > > http://ccrma.stanford.edu/CCRMA/Courses/SummerWorkshops/96/Psychoacoustics/labs/loudness/ > > > > The Pd solution to this is to use lookup tables to scale amplitude, a bit > > less > > fiddly than setting up a piecewise function. > > > > > > On Fri, 13 Jul 2007 21:21:37 +0200 > > Marko Timlin <[EMAIL PROTECTED]> wrote: > > > > > I am working on a patch where I want to change the volume of the sound > > depending of the frequency it´s played at. > > > as we hear frequency logarithimically my idea is: > > > the higher the pitch the more silent the volume and the lower the pitch > > the higher the volume. and all that according to the logarithmic fashion in > > which the human auditory system processes frequencies, as we do not perceive > > them with equal sensitivity. > > > > > > any ideas??? > > > > > > thanks, > > > m. > > > > > > _______________________________________________ > > > [email protected] mailing list > > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > > > -- > > Use the source > > > > _______________________________________________ > > [email protected] mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > > > -- > http://www.badmuthahubbard.com -- Use the source _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
