机械噪声评价用空间声场重现理论及方法

项目名称： 机械噪声评价用空间声场重现理论及方法

项目编号： No.51275262

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 郑四发

作者单位： 清华大学

项目金额： 70万元

中文摘要： 提高声品质是产品设计的需要。基于耳机的评价设备不能反映低频噪声对人的影响，影响到评价结果的真实性和准确性。本项目提出基于空间声场重现的噪声评价方法，围绕其中关键的声场定量重现的理论方法以及复杂边界声场稳健重现方法进行研究。项目具体研究内容包括：1）融合高阶波叠加和边界声场控制的空间声场主动定量重现理论及方法；2）计及人体介入具有复杂边界的声场稳健重现的声场特征在线识别及补偿控制方法；3）基于声场传递矩阵基函数分解的扬声器简化配置方法；4）空间声场重现试验平台。通过上述工作，解决含复杂边界声场重现中的指标量化、系统稳健及系统优化配置问题。项目成果将促进声场重现理论及方法的研究，促进噪声评价方法不断完善，为提高产品声品质研究提供支持。

中文关键词： 噪声评价；声场重现；封闭空间；汽车；声场控制

英文摘要： Improving sound quality is the requirement for product design. The noise evaluation method based on earphone influences the authenticity and accuracy of the results for lack of the low frequency components.The noise evaluation method based on three dimensional sound field reproduction is proposed, the theory and method relating to the robust quatitative reproduction of the sound field with complex boundary is studied. The contents include:1)the active sound field reproduction method based on the synthesis of high order ambisonic and boundary pressure control;2)the online identification of the sound field characteristic and the compension control method to realize the roubust reproduction of the sound field under complex boundary condition considering the influence of the test person;3)the simplified configuration method based on the basic function decomposition of the sound field transfer matrix;4)the experiment test bench for the study. The research will solve the quatitative,robust,and optimal configuration problem in the sound field reproduction. The result will promote the theory research of sound field reproduction in complex boundary conditions, and the application of the result will also contribute to improve the sound quality of mechanical products.

英文关键词： Noise evaluation；sound field reproduction；enclosure space；automobile；noise field control