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• W4285045908 abstract "Wave-based techniques for room acoustics simulations are commonly applied to low frequency analysis and small-sized simplified environments. The constraints are generally the inherent computational cost and the challenging implementation of proper complex boundary conditions. Nevertheless, the application field of wave-based simulation methods has been extended in the latest research decades. With the aim of testing this potential, this work investigates the feasibility of a finite-difference time-domain (FDTD) code simulating large non-trivial geometries in wide frequency ranges. A representative sample of large coupled-volume opera houses allowed demonstration of the capability of the selected FDTD model to tackle such composite geometries up to 4 kHz. For such a demanding task, efficient calculation schemes and frequency-dependent boundary admittances are implemented in the simulation framework. The results of in situ acoustic measurements were used as benchmarks during the calibration process of three-dimensional virtual models. In parallel, acoustic simulations performed on the same halls through standard ray-tracing techniques enabled a systematic comparison between the two numerical approaches highlighting significant differences in terms of input data. The ability of the FDTD code to detect the typical acoustic scenarios occurring in coupled-volume halls is confirmed through multi-slope decay analysis and impulse responses' spectral content." @default.
• W4285045908 created "2022-07-13" @default.
• W4285045908 creator A5032304190 @default.
• W4285045908 creator A5073739428 @default.
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• W4285045908 date "2022-07-01" @default.
• W4285045908 modified "2023-09-29" @default.
• W4285045908 title "Feasibility of a finite-difference time-domain model in large-scale acoustic simulations" @default.
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• W4285045908 doi "https://doi.org/10.1121/10.0012218" @default.
• W4285045908 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35931506" @default.
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