Modelling speech production using Yee's finite difference method

This paper describes a model of speech production based on solving for acoustic wave propagation in the vocal tract using a finite-difference time-domain (FDTD) technique. This FDTD technique was first developed by Yee (1966) and utilizes a discretization scheme in which pressure and velocity compon...

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Bibliographic Details
Main Authors: Cummings, K.E., Maloney, J.G., Clements, M.A.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic propagation
Acoustic waves
Boundary conditions
Finite difference methods
Geometry
Solid modeling
Speech analysis
Speech coding
Speech processing
Time domain analysis
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Summary:This paper describes a model of speech production based on solving for acoustic wave propagation in the vocal tract using a finite-difference time-domain (FDTD) technique. This FDTD technique was first developed by Yee (1966) and utilizes a discretization scheme in which pressure and velocity components are interleaved in both space and time. The specific implementation of this model of speech production, including discretization of the coupled acoustic wave equations, boundary conditions, stability criteria, values of model constants, and method of excitation, are presented. The accuracy of the model is verified by comparing the FDTD results to the theoretically expected results for a well-known acoustics problem. The FDTD model of speech production has been used in a variety of experiments, and several results, including those that compare the use of several common glottal models as excitation, are presented.
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.1995.479687