Evaluation of vocal tract disorder using a variable step adaptive filter

Presents a method to evaluate the dynamic behaviour of the vocal tract shape. Solving the linear prediction model by using Levinson Durbin´s algorithm the dynamic behaviour of the vocal tract shape can be obtained only frame by frame. A more realistic approach can be possible by estimating the shape of the vocal tract point by point using an adaptive filter. In the present work the authors have proposed a variable step adaptive linear prediction scheme for reconstruction of the vocal tract. This results in faster convergence. This method can be used for real time estimation of the vocal tract shape for diagnostic and therapeutic purposes