© Audio Communication Group
Simulation and optimization of the "benchmark for room acoustical simulation"
© Audio Communication Group
Sound Sources
Interpolation by adjoint-based simulations based on synthetic and experimental data
© Mayan Warrior Collective
Sound Fields
Reproduction of sound fields under variable environmental conditions, such as air flow and temperature gradients
© Numerical Fluid Dynamics Group
Boundary Conditions
Acoustic impedance boundary conditions for complex geometries using volume penalization methods
Simulation BRAS
Interpolation of Sound Sources
Reproduction of Sound Fields
Impedance Boundary Conditions

Adjoint Sound

The Adjoint Sound research project is a joint effort of the Audio Communication Group and the Numerical Fluid Dynamics Group.

We investigate in the simulation and optimization of acoustic environments, in particular with sound reinforcement with variable environmental conditions and boundary conditions. A finite difference framework in the time domain is used for the simulation and its adjoint for the optimization.

In the first part of the project, we have demonstrated the simulation and optimization of acoustic sources and their driving functions under the influence of air flow and temperature gradients as well as the synthesis of sound sources with complex directivities. Currently, we are modeling and optimizing complex, acoustic impedance boundary conditions with respect to room acoustical parameters. We use a volume penalization approach, which shows very promising results in a first step.


New DFG project

The DFG continues to fund this research project. The new project will start in January 2024 under the title Modelling and optimization of sound reinforcement scenarios with impedance-affected boundaries.

Forum Acusticum 2023

At the Forum Acusticum 2023, we presented our work with the title "Physics-informed Interpolation of Directional Characteristics of Sound Sources".

JASA article

On February 16, 2023, a paper on approximate acoustic boundary conditions in the time-domain using volume penalization by Mathias Lemke and Julius Reiss was published in the Journal of the Acoustical Society of America.

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