Wave-Based Time-Domain Room Acoustics with Frequency-Dependent Impedance

Application ID: 90551

The use of wave-based techniques for room acoustic simulations has spread in the last years due to the increase in computational performance as well as the development of new numerical methods. The challenge of including realistic impedance conditions at walls is traditionally solved in the frequency domain. Resent research has focused on the implementation of frequency-dependent impedance in the time-domain models using partial fraction representation of the data.

This tutorial demonstrates how to get partial fraction representation of frequency-dependent wall impedance data via the Partial Fraction Fit function and how to use the results to set up the built-in impedance boundary conditions for room acoustic response simulation in the time domain. The model uses the Pressure Acoustics, Time Explicit physics interface to simulate the propagation of sound. The physics interface is based on the discontinuous Galerkin (dG) method which uses a matrix free approach and a time explicit solver. The method is very memory efficient and well suited for distributed computing on a cluster architecture.

This model example illustrates applications of this type that would nominally be built using the following products: