Source directivity simulation in digital waveguide mesh based room acoustics models

2007-03-15
Digital waveguide meshes provide a computationally simple physical modelling approach for simulating wave propagation inside enclosures such as rooms. A digital waveguide mesh allows access both to the pressure values at scattering junctions and to the incoming and outgoing wave variables at those junctions. It is thus possible to access both the pressure and the velocity components of the simulated sound field. This paper proposes a simple method to excite a digital waveguide mesh with outgoing wave variables at the scattering junctions to simulate sound propagation from directional sources. Two examples are given for the 2D digital waveguide mesh to demonstrate the utility of the method.
AES 30th International Conference, 2007

Suggestions

Simulation of Directional Microphones in Digital Waveguide Mesh-Based Models of Room Acoustics
Hacıhabiboğlu, Hüseyin; Günel Kılıç, Banu (2010-02-01)
Digital waveguide mesh (DWM) models are time-domain numerical methods providing computationally simple solutions for wave propagation problems. They have been used in various acoustical modeling and audio synthesis applications including synthesis of musical instrument sounds and speech, and modeling of room acoustics. A successful model of room acoustics should be able to account for source and receiver directivity. Methods for the simulation of directional sources in DWM models were previously proposed. T...
Scattering Delay Network Simulator of Coupled Volume Acoustics
Atalay, Timucin Berk; Su Gul, Zuhre; De Sena, Enzo; Cvetkovic, Zoran; Hacıhabiboğlu, Hüseyin (2022-01-01)
IEEEArtificial reverberators provide a computationally viable alternative to full-scale room acoustics simulation methods for deployment in interactive, immersive systems. Scattering delay network (SDN) is an artificial reverberator that allows direct parametric control over the geometry of a simulated cuboid enclosure as well as the directional characteristics of the simulated sound sources and microphones. This paper extends the concept of SDN reverberators to multiple enclosures coupled via an aperture. ...
Time-domain simulation of directive sources in 3-D digital waveguide mesh-based acoustical models
Hacıhabiboğlu, Hüseyin; Günel Kılıç, Banu (2008-07-01)
Digital waveguide mesh (DWM) models offer a simple, accurate, time-domain, numerical solution of the wave equation. A specific case where such accurate and computationally simple solutions are needed is the acoustical modeling of open or closed volumes. It is possible to model 3-D propagation of waves in enclosures such as rooms using DWM models. Generally, idealized omnidirectional sources are used for obtaining the impulse response in the DWM. However, real-life sound sources are never completely isotropi...
Scattering delay networks with aperture size control for simulating coupled volume acoustics
Atalay, Timuçin Berk; Hacıhabiboğlu, Hüseyin; Department of Modeling and Simulation (2019)
Artificial reverberators provide a computationally viable alternative to full-scale room acoustics simulation methods when used in interactive, immersive systems. Scattering delay network (SDN) is a relatively recent artificial reverberator that allows direct parametric control over the geometry of a simulated rectangular enclosure as well the directional characteristics of the simulated sound sources and microphones. Coupled volume SDN aims to extend the SDN structure for enclosures coupled via an aperture...
On the accuracy of first-order numerical derivatives in multidimensional digital waveguide mesh topologies
Hacıhabiboğlu, Hüseyin; Günel Kılıç, Banu (2008-01-01)
Digital waveguide mesh (DWM) models are numerical solvers for the wave equation in N-dimensions. They are used for obtaining the traveling-wave solution in practical acoustical modeling applications. Although unstructured meshes can be used with DWMs, regular mesh topologies are traditionally used due to their implementation simplicity. This letter discusses the accuracy of first-order approximations to numerical derivatives on more general unstructured mesh topologies. The results are applied to structured...
Citation Formats
H. Hacıhabiboğlu and B. Günel Kılıç, “Source directivity simulation in digital waveguide mesh based room acoustics models,” presented at the AES 30th International Conference, 2007, Saariselka, Finland, 2007, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/87571.