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.
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however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.