Contribution
Simulation and adjoint-based identification of a room acoustical benchmark case
* Presenting author
Abstract:
Acoustic simulations are widely used in room acoustics, with ray-based methods often preferred for their low computational cost, though they have limitations in accuracy. Wave-based methods, such as finite differences in the time domain (FDTD), offer greater accuracy but face difficulties in modeling complex acoustic boundaries. A promising solution to these challenges is volume penalization, which integrates parameters like fluid resistivity and porosity into the governing equations. However, these parameters are typically sourced from tables with inherent uncertainty ranges, limiting the simulation’s ability to produce fully reliable results.In this study, the volume penalization method is applied to simulate a case from the Benchmark for Room Acoustical Simulations (BRAS). The boundary parameters are optimized during the simulation using the adjoint approach, aligning the simulation with reference data from high-fidelity simulations and experimental measurements to achieve a more reliable acoustic simulation.