Bennie Gustafssons presenterar sitt examensarbete


Formant estimation and time-frequency analysis of imitator data


Abstract:

When dealing with speech, it is a standard procedure in applied
phonetics to examine the formants, i.e. the resonance frequencies of
the vocal tract. It is also common to look at the pitch and energy
trajectories of the speech data.  In this thesis different estimation
methods are used on recordings of the word /halo/ by a professional
imitator, in different situations and dialects. Formats are obtained
using LPC. The pitch trajectories are estimated with the so called
cepstrum whereas the energy estimates are estimated from
spectrograms. A comparison is made between some bilinear
time-frequency representations and problems with getting formant and
pitch estimates from them are discussed.

Furthermore, a simple analysis is made of features extracted from the
final formant, pitch and energy estimates.