Source directivity simulation in digital waveguide mesh based room acoustics models

Date

2007-03-15

Author

Hacıhabiboğlu, Hüseyin
Günel Kılıç, Banu

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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.

Subject Keywords

Acoustic fields, Acoustic signal processing, Acoustics, Architectural acoustics, Crack propagation, Digital arithmetic, Models, Pressure, Two dimensional, Waveguides, Waves

URI

https://hdl.handle.net/11511/87571
https://users.metu.edu.tr/hhuseyin/Conferences/hhogunkon_aes30rev.pdf

Conference Name

AES 30th International Conference, 2007

Collections

Graduate School of Informatics, Conference / Seminar

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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...
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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.