基于声学模型的鲁棒性声场重建与控制技术

Sound field reconstruction and control algorithms have disadvantage with requiring stringent performance of equipment, poor environmental adaptability and measurements complicating. In this project, the acoustic model of loudspeaker array using for sound reconstruction and control will be established, which is based on sound field characteristics of loudspeaker array in physical environment and the measurement technology of microphone array. According to the laws of physics acoustic radiation propagating in air, the error prediction model will be established too, which revolves the difference between measurement environmental and physical environment, the inconsistency of the loudspeakers, and limitations of microphone array. Based on the acoustic model and the error prediction model, the acoustic model based robustness acoustic reconstruction and control will be developed which combines with sound field reconstruction and control technologies and robust control technology of MIMO systems. With simplifying algorithm designing and verification processes, the purpose of this project is to improve suitability of sound field reconstruction and control algorithm for sound source and sound environmental perturbations, and then achieving more accurate, more stable, more practical sound field reconstruction and control

针对目前的声场重建与控制算法对声重放设备的性能要求严苛、环境适应性差、测量工作复杂繁琐等问题，本项目拟从实际环境中扬声器阵列系统的声场特性出发，结合声学阵列测量技术，建立应用于声场重建、声场控制等扬声器阵列技术的扬声器阵列声学模型。依据声辐射在空气中传播的物理规律，围绕测量环境和应用环境的声学差异、实际阵列单元辐射特性的不一致性、声学阵列测量的局限性，建立相应的误差预测模型。在此基础上，结合声场重建和控制技术、MIMO系统的鲁棒性控制技术，研发基于声学模型的鲁棒性声场重建与控制技术。在简化算法设计和验证流程的同时，提高声场重建与控制算法对声源和声环境扰动的适应性，进而实现更精确、更稳健、更实用的声场重建和控制。

针对目前的声场重建与控制算法对声重放设备的性能要求严苛、环境适应性差、测量工作复杂繁琐等问题，本项目从实际环境中扬声器阵列系统的声场特性出发，结合声学阵列测量技术，建立应用于声场重建、声场控制等扬声器阵列技术的扬声器阵列声学模型。依据声辐射在空气中传播的物理规律，围绕测量环境和应用环境的声学差异、实际阵列单元辐射特性的不一致性、声学阵列测量的局限性，建立相应的误差预测模型。在此基础上，结合声场重建和控制技术、MIMO系统的鲁棒性控制技术，研发基于声学模型的鲁棒性声场重建与控制技术。在简化算法设计和验证流程的同时，提高声场重建与控制算法对声源和声环境扰动的适应性，进而实现更精确、更稳健、更实用的声场重建和控制。根据研究内容，完成了基于声学模型的鲁棒性个人音频的理论、框架和分析，少量传递函数现场测量的鲁棒性ACC研究，具有方向性的局部声场的鲁棒性个人音频重放技术。