Re: histograms of F0 in speech contours (Eckard Blumschein )

Subject: Re: histograms of F0 in speech contours
From:    Eckard Blumschein  <Eckard.Blumschein(at)E-TECHNIK.UNI-MAGDEBURG.DE>
Date:    Mon, 14 May 2001 13:55:16 +0200

Christian, Having alluded first doubts on May 9, I appreciate your mediating suggestions. I would merely like to add that I feel tempted to see the apparent poles and zeros in the data in Martin's paper possibly caused by physical reasons. Maybe, I am wrong if I guess that many of us are not very familiar with the astonishingly similar modes of standing waves in cavities like the trachea. In my humble understanding, while the glottis vibrates with f0, it creates a sequence of glottal pulses rather than a sinusoidal signal. I imagine: i) It is difficult if not impossible to correctly extract f0, in particular after the modulation that forms the formants of speech and with uncertain intervals of analysis,. ii) There might be some values of f0 which are more or less difficult to exactly tune to by an individual singer for physical reasons. What about our knowledge of theory describing acoustic waves, everybody may test herself or himself. Do you know evanascent waves and whispering gallery modes? I selected these examples in order to support Andrew Bell whose idea of SAW at the surface of tectorial membrane did perhaps not yet find the due expert judgement. Kind regards, Eckard

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