实时模拟复杂空间中声音衰减，支持多声源与听者动态变化。
Modeling nonuniform energy decay through the modal decomposition of acoustic radiance transfer (MoD-ART)
- 基于声辐射传递的模态分解，提取能量衰减模式与位置关系。
- 可捕捉多重衰减斜率和颤动回声，计算效率高于光线追踪。
- 适合复杂几何与不均匀吸声环境，适用于实时交互应用。
在存在多个声源和听者的环境中，实时建模晚期混响是一项挑战，尤其当环境几何复杂或具有非均匀能量吸收（如连通空间）时，晚期混响依赖于声源和听者的具体位置，需随其移动实时调整。本文提出一种新方法——模态分解声辐射传递（MoD-ART），能够高效处理高度复杂场景。该方法基于几何声学中的声辐射传递，从中提取一组能量衰减模态及其与声源、听者的位置关系。论文阐述了MoD-ART的物理与数学意义，强调其在不同场景下的优势与适用性。通过计算复杂度分析，表明其性能显著优于光线追踪。仿真结果还显示，MoD-ART能准确捕捉多重衰减斜率与颤动回声现象。
原文摘要 · Abstract (English)
Modeling late reverberation in real-time interactive applications is a challenging task when multiple sound sources and listeners are present in the same environment. This is especially problematic when the environment is geometrically complex and/or features uneven energy absorption (e.g. coupled volumes), because in such cases the late reverberation is dependent on the sound sources' and listeners' positions, and therefore must be adapted to their movements in real time. We present a novel approach to the task, named modal decomposition of acoustic radiance transfer (MoD-ART), which can handle highly complex scenarios with efficiency. The approach is based on the geometrical acoustics method of acoustic radiance transfer, from which we extract a set of energy decay modes and their positional relationships with sources and listeners. In this paper, we describe the physical and mathematical significance of MoD-ART, highlighting its advantages and applicability to different scenarios. Through an analysis of the method's computational complexity, we show that it compares very favorably with ray-tracing. We also present simulation results showing that MoD-ART can capture multiple decay slopes and flutter echoes.
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