I recently heard a seminar by a researcher called Gopala Anumanchipalli[1], here in Portugal. 
He works around similar subjects (modelling and extracting pronunciation via signal processing - and in order to to that I think he extracts consonants and vowels), take a look at his homepage maybe there's something there.

[1] http://www.cs.cmu.edu/~gopalakr/

also, http://www.cs.cmu.edu/~gopalakr/publications/Gopal_Thesis_final.pdf

Best regards,
Pedro
p.s.: maybe a too long shot. but what the heck. :)

On Thu, Dec 16, 2010 at 7:12 PM, tim vets <timvets@gmail.com> wrote:
I09.sheep.from.goats.pd ?
gr,
Tim


2010/12/16 Ivica Ico Bukvic <ico@vt.edu>

Hi all,

I have been playing with fft lately and was wondering if anyone has some pointers on how to extract consonants from vowels in human speech. I suspect it is detection of noisy signal that generally populates a much wider band of frequencies approaching some sort of filtered white noise (depending on the consonant) but am not sure as to what is the best strategy in isolating these at least somewhat reliably.

Any ideas/pointers would be most appreciated.

Ivica Ico Bukvic, D.M.A.
Composition, Music Technology
Director, DISIS Interactive Sound & Intermedia Studio
Director, L2Ork Linux Laptop Orchestra
Assistant Co-Director, CCTAD
CHCI, CS, and Art (by courtesy)
Virginia Tech
Dept. of Music - 0240
Blacksburg, VA 24061
(540) 231-6139
(540) 231-5034 (fax)
ico@vt.edu
http://www.music.vt.edu/faculty/bukvic/



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--
Pedro Lopes (MSc)
contact: pedro.lopes@ist.utl.pt
website: http://web.ist.utl.pt/Pedro.Lopes