The FDTD Simulation Toolbox is an easy to use GUI written in MATLAB 7.6.0 (R2008a) which allows for acoustic simulations of non-rectangular topologies. The modeling technique utilized is a finite-difference time-domain (FDTD) method. Boundary conditions are treated as perfectly rigid with frequency-independent absorption.

Any number of sources can be placed within the space (limited by the number of pressure grid points). By default, sources are simple point sources that can utilize auxiliary point sources to create dipole or cardioid polar patterns, if needed. Loudspeaker enclosures can also be modeled if greater accuracy is required.

Up to one hundred listening points can be placed within the acoustical space, either placed in a grid or placed manually. Each listening point records the pressure response during the simulation to be used for data analysis.

During simulations, the spatial sound pressure distribution can be displayed as 2D or 3D animations. Further data analysis options include time/frequency domain analysis as well as special tone burst analysis features and a simple auralization function.

This version of the toolbox has had functions sensitive to current research in the Audio Research Laboratory, University of Essex, removed so that the toolbox can be distributed freely among researchers. Under no circumstances may this toolbox be used in commercial/for-profit applications. However, you are most welcome to use the programs to support research, although formal acknowledgement is expected.

Users are encouraged to improve the code in any way seen fit along with creating new functions for the toolbox. Any updates are welcome and can be emailed for inclusion as updated versions on the website.

DOWNLOADS:      FDTD Simulation Toolbox v8.5 (UPDATED: 26-July-2011)

FDTD Toolbox - User’s Guide (13-Jan-2011)