Room Acoustics Modelling

室内声学建模

• 批准号: 192389201
• 负责人: Professor Dr. Michael Vorländer
• 金额: --
• 依托单位: Lehrstuhl und Institut für Hörtechnik und Akustik (IHTA)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/192389201?language=en
• 关键词: Room; Acoustics; Modelling

Round-robin tests during the last decades have convincingly shown that the common geometric modelling schemes where diffraction and scattering of sound are not adequately taken into account do not reliably predict sound fields in enclosed spaces. As a modelling tool in which the physical properties, i.e., the wave character, of sound is fully taken into account, TU Delft proposed the so-called WRW room acoustics modelling concept, derived from a modelling scheme commonly used in seismic exploration of oil and gas. The calculation schemes of the WRW model are based on the acoustic wave equation. Matrices R describe the local reflective properties of the room boundaries, matrices W specify the sound propagation to and from each boundary point. Goal of this subproject Is to develop the WRW model from an attractive concept to an operational and efficient simulation tool. To realize this goal, an appropriate description of the reflective properties ofthe room boundaries should be determined, to be Inserted in the matrices R. A library of such reflectivity properties for common boundary constructions has to be compiled, after determination of these properties by inverse extrapolation of microphone array measurement data. It also has to be investigated how the sound propagation between all boundary points, as described by the matrices W, can be calculated In a computationally most effective way. The end product of the subproject should be a simulation software package enabling the accurate and predictive simulation of 3D acoustic wave fields in complex enclosures, as a reference tool for research.

过去几十年的循环测试令人信服地表明，未充分考虑声音衍射和散射的常见几何建模方案无法可靠地预测封闭空间中的声场。作为一种充分考虑声音物理特性（即波特性）的建模工具，代尔夫特理工大学提出了所谓的WRW室内声学建模概念，该概念源自石油和天然气地震勘探中常用的建模方案。 WRW模型的计算方案基于声波方程。矩阵 R 描述房间边界的局部反射特性，矩阵 W 指定传入和传出每个边界点的声音传播。该子项目的目标是将 WRW 模型从一个有吸引力的概念发展为一个可操作且高效的模拟工具。为了实现这一目标，应确定房间边界反射特性的适当描述，并将其插入矩阵 R 中。在通过麦克风阵列测量数据的逆外推确定这些特性之后，必须编译常见边界结构的此类反射特性的库。还必须研究如何以计算上最有效的方式计算矩阵 W 所描述的所有边界点之间的声音传播。该子项目的最终产品应该是一个仿真软件包，能够对复杂外壳中的 3D 声波场进行精确的预测性仿真，作为研究的参考工具。