Title :
Boundary conditions in a multi-dimensional digital waveguide mesh
Author :
Kelloniemi, Antti ; Murphy, Damian T. ; Savioja, Lauri ; Välimäki, Vesa
Author_Institution :
Telecommun. Software & Multimedia Lab, Helsinki Univ. of Technol., Finland
Abstract :
The digital waveguide mesh is a modeling technique suitable for simulation of wave propagation in an acoustic system. Artificial boundary conditions are constructed for the digital waveguide mesh. Absorbing boundary conditions are evaluated and a new method for adjusting the reflection coefficient at values 0≤r≤1 is introduced. The frequency dependent error level of this method is minimized by the use of a second-order FIR filter.
Keywords :
FIR filters; acoustic wave propagation; acoustic wave reflection; acoustic waveguides; acoustics; digital simulation; minimisation; acoustic modeling technique; acoustic wave propagation; artificial boundary conditions; error minimization; multi-dimensional digital waveguide mesh; reflection coefficient; second-order FIR filter; Acoustic reflection; Acoustic waveguides; Acoustic waves; Acoustical engineering; Boundary conditions; Difference equations; Frequency; Instruments; Rectangular waveguides; Solid modeling;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326754
