An extended two-dimensional vocal tract model for fast acoustic simulation of single-axis symmetric three-dimensional tubes

09/19/2019
by   Debasish Ray Mohapatra, et al.
0

The simulation of two-dimensional (2D) wave propagation is an affordable computational task and its use can potentially improve time performance in vocal tracts' acoustic analysis. Several models have been designed that rely on 2D wave solvers and include 2D representations of three-dimensional (3D) vocal tract-like geometries. However, until now, only the acoustics of straight 3D tubes with circular cross-sections have been successfully replicated with this approach. Furthermore, the simulation of the resulting 2D shapes requires extremely high spatio-temporal resolutions, dramatically reducing the speed boost deriving from the usage of a 2D wave solver. In this paper, we introduce an in-progress novel vocal tract model that extends the 2D Finite-Difference Time-Domain wave solver (2.5D FDTD) by adding tube depth, derived from the area functions, to the acoustic solver. The model combines the speed of a light 2D numerical scheme with the ability to natively simulate 3D tubes that are symmetric in one dimension, hence relaxing previous resolution requirements. An implementation of the 2.5D FDTD is presented, along with evaluation of its performance in the case of static vowel modeling. The paper discusses the current features and limits of the approach, and the potential impact on computational acoustics applications.

READ FULL TEXT
research
02/09/2021

A comparative study of two-dimensional vocal tract acoustic modeling based on Finite-Difference Time-Domain methods

The two-dimensional (2D) numerical approaches for vocal tract (VT) model...
research
07/11/2019

Simulation of 3D elasto-acoustic wave propagation based on a Discontinuous Galerkin Spectral Element method

In this paper we present a numerical discretization of the coupled elast...
research
12/08/2022

On inclusion of source in the system of first-order linear acoustic wave equations

Simulating propagation of acoustic waves via solving a system of three-c...
research
02/02/2023

Machine Learning Extreme Acoustic Non-reciprocity in a Linear Waveguide with Multiple Nonlinear Asymmetric Gates

This work is a study of acoustic non-reciprocity exhibited by a passive ...
research
05/22/2022

A Convolutional Dispersion Relation Preserving Scheme for the Acoustic Wave Equation

We propose an accurate numerical scheme for approximating the solution o...
research
10/12/2021

Generalized Time Domain Velocity Vector

We introduce and analyze Generalized Time Domain Velocity Vector (GTVV),...
research
12/04/2020

Acoustic Hologram Optimisation Using Automatic Differentiation

Acoustic holograms are the keystone of modern acoustics. It encodes thre...

Please sign up or login with your details

Forgot password? Click here to reset