Subject: Re: Is there considerable phase locking up to 6 kHz? From: beaucham <beaucham(at)MANFRED.MUSIC.UIUC.EDU> Date: Wed, 17 Mar 2004 11:45:28 -0600Dear Christian, Along these lines, with respect to the sound examples posted on his web site, I responded (privately) to Chen-Gia as follows: >On the 300 Hz F0 example I'm hearing E-G#-B . > >On the 350 Hz F0 example I'm hearing G-B-D, although somewhat flat >compared to standard. > >On the 400 Hz F0 example I'm hearing A-C#-E. > >Could it be that I'm hearing the pitch of the center harmonic? I didn't receive an answer to that question. However, I noted that these are each musical pitches corresponding to a major triad, which corresponds approximately to the ratios 4:5:6. Taking the 400 Hz example, the center harmonic frequencies are: 4400, 5200, 6000, which have the ratios 4.2 : 5: 5.77 -- not a bad comparison, except that 5.77/4.2 = 1.373 is more like a 3:4 interval than a 2:3. Also, if I compute the equal-tempered pitches that match these frequencies I get C#, E+, F# (E+ is about half-way between an E and an F), which is not what I heard. So the place-theory idea might hold some water, but it's not very accurate. Jim Beauchamp Univ. of Illinois at Urbana-Champaign You wrote: >From: Christian Kaernbach <mailinglist(at)KAERNBACH.DE> >Date: Wed, 17 Mar 2004 15:08:56 +0100 >To: AUDITORY(at)LISTS.MCGILL.CA >Subject: Re: Is there considerable phase locking up to 6 kHz? > >Dear Chen-Gia Tsai, > >> I use three stimuli: >> A={400*9, 400*11, 400*13} Hz >> B={400*11, 400*13, 400*15} Hz >> C={400*13, 400*15, 400*17} Hz >> >> If we listen to [ABC], we can hear an ascending melody, > >I seem not to get your point. If ABC of the above three stimuli is >perceived as an ascending melody, this is surely due to their spectral >content being at increasingly high frequency values. The mid-frequncy of >A is 4400 Hz, of B 5200 Hz, of C it is 6000 Hz. Why should any simple >"place" model of pitch perception not predict that one perceives a >rising melody in ABC? > >Temporal pitch extraction would extract 400 Hz in all three cases (if >operating flawlessly, and all effects of compression etc. put aside) . >Thus, if listening to your temporal pitch extractor (if you were >selectively able to do so) you would hear 400, 400, 400 Hz, i.e. no rise >in pitch (but change in timbre). > >Best, >Christian Kaernbach >