Inverse determination of acoustic boundary conditions

声学边界条件的反演

• 批准号: 429580168
• 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 Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/429580168?language=en
• 关键词: Inverse; determination; acoustic; boundary; conditions

Goal of the project is the creation of inverse numerical wave methods for estimation of acoustic boundary conditions of porous materials. The fundamentals of these inverse estimation methods shall be developed and validated. The project goals are achieved in four steps: a) inverse numerical methods for determination of model parameters of porous absorbers, b) description of a measurement method for reference absorbers for reverberation chamber measurements, c) expansion of the numerical method towards direct reverberation room measurements, and d) for non-locally reacting absorbers and with a-priori knowledge about the distribution of incidence angles on the absorber surface, the creation and validation of a method for definition and determination of “representative” angular independent impedances. The methods applied are measurement techniques in conjunction with numerical methods and optimization algorithms. The results of the project are more precise input data for acoustic calculation methods, which gain improved prediction uncertainty.

该项目的目标是创建用于估计多孔材料的声学边界条件的逆数值波方法。这些逆估计方法的基本原理应得到发展和验证。项目目标分四个步骤实现：a）用于确定多孔吸收体的模型参数的逆数值方法，B）用于混响室测量的参考吸收体的测量方法的描述，c）将数值方法扩展到直接混响室测量，以及d）对于非局部反应吸收体并且具有关于吸收体表面上的入射角分布的先验知识，创建和验证用于定义和确定“代表性”角独立阻抗的方法。应用的方法是测量技术结合数值方法和优化算法。该项目的结果为声学计算方法提供了更精确的输入数据，从而改善了预测的不确定性。