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For computational efficiency, acoustic simulation of late reverberation can be simplified by generating a limited number of incoherent signals with frequency-dependent exponential decay radiated by spatially distributed virtual reverberation sources (VRS). A sufficient number of VRS and adequate spatial mapping are required to approximate spatially anisotropic late reverberation, e.g., in rooms with inhomogeneous distribution of absorption or for coupled volumes. For coupled rooms, moreover, a dual-slope decay might be required. Here, an efficient and perceptually plausible method to generate and spatially render late reverberation is suggested. Incoherent VRS signals for (sub-) volumes are generated based on room dimensions and frequencydependent absorption coefficients at the boundaries. For coupled rooms, (acoustic) portals account for effects of sound propagation and diffraction at the room connection and energy transfer during the reverberant decay process. The VRS are spatially distributed around the listener, with weighting factors representing the spatially subsampled distribution of absorption on the boundaries and the location and solid angle covered by portals. A technical evaluation and listening tests demonstrate the validity of the approach in comparison to measurements in real rooms.
Author (s): Kirsch, Christoph; Wendt, Torben; Van De Par, Steven; Hu, Hongmei; Ewert, Stephan D.
Affiliation:
Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany
(See document for exact affiliation information.)
Publication Date:
2023-04-06
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Kirsch, Christoph; Wendt, Torben; Van De Par, Steven; Hu, Hongmei; Ewert, Stephan D.; 2023; Computationally-Efficient Simulation of Late Reverberation for Inhomogeneous Boundary Conditions and Coupled Rooms [PDF]; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=22040
Kirsch, Christoph; Wendt, Torben; Van De Par, Steven; Hu, Hongmei; Ewert, Stephan D.; Computationally-Efficient Simulation of Late Reverberation for Inhomogeneous Boundary Conditions and Coupled Rooms [PDF]; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Akustik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Medizinische Physik and Cluster of Excellence Hearing4all, Carl von Ossietzky Universität, Oldenburg, Germany; Paper ; 2023 Available: https://aes2.org/publications/elibrary-page/?id=22040
@article{kirsch2023computationally-efficient,
author={kirsch christoph and wendt torben and van de par steven and hu hongmei and ewert stephan d.},
journal={journal of the audio engineering society},
title={computationally-efficient simulation of late reverberation for inhomogeneous boundary conditions and coupled rooms},
year={2023},
volume={71},
issue={4},
pages={186-201},
month={april},}
TY – paper
TI – Computationally-Efficient Simulation of Late Reverberation for Inhomogeneous Boundary Conditions and Coupled Rooms
SP – 186 EP – 201
AU – Kirsch, Christoph
AU – Wendt, Torben
AU – Van De Par, Steven
AU – Hu, Hongmei
AU – Ewert, Stephan D.
PY – 2023
JO – Journal of the Audio Engineering Society
VO – 71
IS – 4
Y1 – April 2023