Subject:Re: Temporal encoding of pitch from resolved harmonicsFrom:Alexandra Hettergott <a.hettergott(at)WANADOO.FR>Date:Wed, 18 Oct 2000 21:54:21 +0200From: Peter Cariani <peter(at)epl.meei.harvard.edu> >Hi Chris, Annemarie, >Various groups of people use the terms spectral information >and spectral cues in different ways. >It helps to be clear about whether one is talking about >1) frequency-related structure in the power spectrum of the stimulus, >(acoustical sense) or >2) frequency-based neural representations of the stimulus, >(neurophysiological sense) or >3) the ability of listeners to discriminate different acoustic spectra >(psychophysical sense). Hi, just to mention that in digital signal processing you are generally calculating spectral information (coefficients as components in the frequency domain, e.g., "resolved harmonics") proceeding from the (digitized) temporal representation ("wave form") of a given signal, e.g., by means of the Fourier analysis -- and inversely (note that the Fourier transform is sort of a change of the coordinate system). In case of a periodic signal, you would have what you might refer to by "temporal phase locking", first, by virtue of (mathematically) taking its repetition rate/frequency, or periodicity, into account (for the fundamental ; oscillation pattern/envelope relate to additional components), as well as by the fact of its periodically being sampled (i.e., sampling frequency (f_s)/sampling interval (delta t), where f_s=3D1/delta t). ..... Alexandra Hettergott. _______________________ Alexandra Hettergott 1, avenue des Gobelins /bo=EEte 23 F-75005 Paris/France T=E9l/fax: +33-(0)1-43 31 41 27 M=E9l: a.hettergott(at)wanadoo.fr http://perso.wanadoo.fr/a.hettergott/ _,,_ =B2( o o )=B3 /` =B0.. =B4\\ ( (| =B4 | )) \ ` =EF // ... peque=F1os ruidos """" proyectados en el tiempo ...

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