Optimal Soundfield Generation for Sound Reinforcement in Time and Frequency Domain
时域和频域扩声的最佳声场生成
基本信息
- 批准号:393106680
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2018
- 资助国家:德国
- 起止时间:2017-12-31 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Large-scale sound reinforcement for speech and music is nowadays typically realized with line array systems. Their drive has to be optimized with respect to several degrees of freedom, e.g. arrangement, geometry, construction of the boxes and different boundary constraints, e.g. geometry of the auditory, areas that have to be avoided, available acoustic power. It is an ill-posed inverse problem in mathematical terms. The number of sources is less than the number of receivers. There are no scientifically reported solutions and no approved theoretical methods for this application. The project therefore aims at (a) advancing traditional approaches for the radiation of array systems in the frequency domain and (b) implementing an adjoint-based approach in the time domain which has proven its capabilities in fluid dynamics. By involving an expert focus group of scientists, developers and users an application-oriented agreement on objective criteria and quantitative indices for evaluating the quality of sound systems is to be achieved. The criteria are used within the project for the comparative evaluation of the performance of the two approaches and moreover as the basis for a "Sound Reinforcement Challenge" as a new central forum for the development of sound systems. The driving functions optimized by numerical simulations in the time and frequency domains and the predicted sound fields are to be verified by an experimental setup in an anechoic room. By means of the adjoint method the influence of a base flow on the generated sound field is taken into account for the first time, which can be of great practical relevance if it comes to the influence of wind flows on speech intelligibility. Due to different methodological challenges, the project goals can only be reached by a cooperation of departments with expertise in acoustics and audio technology (with specific experience in the field of sound field synthesis) and numerical fluid dynamics (with specific experience in the adjoint method) as it is to be implemented in this project.
如今,语音和音乐的大规模扩声通常是通过线阵系统来实现的。它们的驱动必须针对几个自由度进行优化,例如布置、几何形状、盒子的结构和不同的边界约束,例如听觉的几何形状、必须避免的区域、可用声功率。从数学角度来说,这是一个不适定的反问题。源的数量少于接收器的数量。对于这一应用,没有科学报道的解决方案,也没有得到认可的理论方法。因此,该项目的目标是(A)在频域改进阵列系统辐射的传统方法,(B)在时间域实施一种已证明其在流体动力学方面的能力的基于伴随的方法。通过一个由科学家、开发人员和用户组成的专家重点小组的参与,将就评价音响系统质量的客观标准和量化指标达成面向应用的协议。该标准在项目中用于对两种方法的性能进行比较评估,并作为“扩声挑战”的基础,作为发展音响系统的一个新的中心论坛。通过时频域数值模拟优化的驱动函数和预测的声场将通过消声室的实验装置进行验证。借助于伴随方法,首次考虑了基流对产生的声场的影响,如果涉及到风流对语音清晰度的影响,这将具有很大的实际意义。由于方法上的挑战不同,只有在声学和音频技术(在声场合成领域有具体经验)和数值流体动力学(在伴随方法方面有具体经验)方面有专长的部门合作,才能实现项目目标,因为它将在本项目中实施。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Dr.-Ing. Mathias Lemke其他文献
Dr.-Ing. Mathias Lemke的其他文献
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{{ truncateString('Dr.-Ing. Mathias Lemke', 18)}}的其他基金
Coherent Vortex Simulation of Flapping Flight in Turbulence
湍流中扑动飞行的相干涡模拟
- 批准号:
529979103 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Adjoint-based identification of freely moving sound sources
基于伴随的运动声源识别
- 批准号:
504470212 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Modeling and optimization of sound reinforcement scenarios with impedance affected boundaries in the time domain
时域阻抗影响边界的扩声场景建模和优化
- 批准号:
532453154 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants