{"ID":2883166,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2508.08775","arxiv_id":"2508.08775","title":"SonicRadiation: A Hybrid Numerical Solution for Sound Radiation without Ghost Cells","abstract":"Interactive synthesis of physical sound effects is crucial in digital media production. Sound radiation simulation, a key component of physically based sound synthesis, has posed challenges in the context of complex object boundaries. Previous methods, such as ghost cell-based finite-difference time-domain (FDTD) wave solver, have struggled to address these challenges, leading to large errors and failures in complex boundaries because of the limitation of ghost cells. We present SonicRadiation, a hybrid numerical solution capable of handling complex and dynamic object boundaries in sound radiation simulation without relying on ghost cells. We derive a consistent formulation to connect the physical quantities on grid cells in FDTD with the boundary elements in the time-domain boundary element method (TDBEM). Hereby, we propose a boundary grid synchronization strategy to seamlessly integrate TDBEM with FDTD while maintaining high numerical accuracy. Our method holds both advantages from the accuracy of TDBEM for the near-field and the efficiency of FDTD for the far-field. Experimental results demonstrate the superiority of our method in sound radiation simulation over previous approaches in terms of accuracy and efficiency, particularly in complex scenes, further validating its effectiveness.","short_abstract":"Interactive synthesis of physical sound effects is crucial in digital media production. Sound radiation simulation, a key component of physically based sound synthesis, has posed challenges in the context of complex object boundaries. Previous methods, such as ghost cell-based finite-difference time-domain (FDTD) wave...","url_abs":"https://arxiv.org/abs/2508.08775","url_pdf":"https://arxiv.org/pdf/2508.08775v2","authors":"[\"Xutong Jin\",\"Fei Zhu\",\"Guoping Wang\",\"Sheng Li\"]","published":"2025-08-12T09:21:02Z","proceeding":"cs.SD","tasks":"[\"cs.SD\",\"cs.GR\",\"math.NA\"]","methods":"[]","has_code":false}