Dear Reg:
Thanks for the info on calculating the sinusoidal components and their relative amplitudes via Fourier analysis. It will take some returning to my engineering math for me but I like to see if I can still follow earlier work in his area.
You would be interested, I think, to know that when using the vowel mirror devised by Burt Coffin I powered it with a square wave generator/tuner. As a result, it made it a lot easier to locate the vocal tract shapes necessary to focus individual vowels because I was primarily working with the odd harmonics.
The one question you have not yet answered to my satisfaction is why you are convinced that the open/close mode function of the vocal folds will produce only a square wave. It is not true of the similar function of the lips when played with just a trumpet mouthpiece. Or are not speaking of only the phonated tone (or only the trumpet mouthpiece tone).
-- Lloyd W. Hanson
|