Abstract
The digital waveguide mesh (DWM) was first introduced as a modeling technique for musical acoustics applications in 1993 as a natural extension to the 1D digital waveguide that is widely used in physical modeling sound synthesis. DWM related work at York has focused on a number of areas with notable results including reverberation simulation using the 2D triangular mesh, modeling enclosed spaces with the 3D tetrahedral mesh, improved anechoic absorbing boundary conditions (ABCs) and the analysis and validation of spatial properties of DWM-based room impulse response measurements. This paper presents recent results from three current areas of research. RoomWeaver is a development environment that facilitates research into the application of DWM-based models for virtual acoustic spaces, incorporating new hybrid mesh-types in 2D and 3D through the use of KW-pipes. The second parallel research area involves the development of new boundary formulations that extend the anechoic ABC to the more general frequency dependent case with variable diffuse reflection control. Finally, Digitract is a speech synthesis research tool based on a 2D DWM model of the human vocal tract that offers improved control over formant bandwidths and greater naturalness in the production of speech sounds.
Published Version
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