Estimation of the vocal tract shape producing fricative consonants.

The acoustics of fricative consonants

Dedication Acknowledgments Biographical Note List of Symbols

Estimation of Vocal Tract Shape during Stop Closures

The display of intensity, pitch, and vocal tract shape is considered to be helpful in speech training of the hearing impaired. Vocal tract shape estimation, based on LPC and other analysis techniques, works satisfactorily for vowels but generally fails during stop consonants due to very low signal energy. Our estimation of vocal tract shape is based on reflection coefficients obtained from LPC ...

Pole-zero modeling of vocal tract for fricative sounds

This paper presents a pole-zero model based on a multi-tube acoustic model for fricative sounds. This model consists of the front and back cavity formed by oral tract and pharynx, in which the excitation source is located at the point of constriction. The transfer function of this model including poles and zeros is derived and its properties are investigated. Small losses such as viscous fricti...

The formant patterns of fricative consonants

Vocal tract shape trajectory estimation using MLP analysis-by-synthesis

The objective of this work is a computationally e cient method for inferring vocal tract shape trajectories from acoustic speech signals. We use an MLP to model the vocal tract shape-to-acoustics mapping, then in an analysisby-synthesis approach, optimise an objective function that includes both the accuracy of the spectrum approximation and the credibility of the vocal tract dynamics. This opt...