| 林帆,刘祖斌.基于声辐射复模态的板声源声场分离方法[J].高技术通讯(中文),2024,34(11):1224~1233 |
| 基于声辐射复模态的板声源声场分离方法 |
| Sound field separation for a plate source based on complex acoustic radiation modes |
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| DOI： |
| 中文关键词: 声场分离； 声辐射复模态； 基向量； 重排截断； 阶次选择 |
| 英文关键词: sound field separation, complex acoustic radiation mode, basis vector, rearrangement and truncation, order selection |
| 基金项目: |
| 作者 | 单位 | | 林帆 | （浙江工业大学特种装备制造与先进加工技术教育部重点实验室杭州 310014） | | 刘祖斌 | |
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| 摘要点击次数: 14 |
| 全文下载次数: 31 |
| 中文摘要: |
| 噪声环境下目标声场的声学量测量一直是声学研究热点之一，而声场分离技术则是解决该问题的重要手段。针对板球2个异构声源的叠加声场，本文提出了一种基于声辐射复模态的板声源声场分离方法。首先计算目标板声源和干扰球声源的声辐射复模态和对应的基向量，再通过测量声压计算每阶基向量的独立贡献，然后对其进行顺序重排和截断选取，最后求解分离系数得到目标声场。数值仿真表明，无环境白噪声时，目标声场的分离误差小于0.01‰；当白噪声水平SNR=25dB时，声场分离误差小于10%。此外，声源间声压比、环境白噪声水平、被选阶次的数目、测点数目和测量面形状等影响因素都得到了分析。 |
| 英文摘要: |
| The acoustic quantity measurement of target source in a noisy environment has always been one of the hotspots in the research field of acoustics, and the sound field separation is the key technology to solve it. For a superposition sound field of one plate source and one sphere source, a sound field separation method based on complex acoustic radiation modes (ARMs) is proposed in this paper. Firstly, ARMs and corresponding basis vectors of the target plate source and the interference sphere source are calculated, and then the independent contribution of each order acoustic basis vector is calculated with the measurement of sound pressure, and the basis vectors are rearranged and truncated. Finally, the target sound field is obtained by solving the separation coefficient. Numerical simulations verify that the separation error is less than 0.01‰ when there is no environmental white noise and is below 10% with the white noise level SNR=25dB. In addition, the influencing factors such as sound pressure ratio between sources, white noise level, the number of selected orders, the number of measuring points and the shape of the measuring surface are analyzed. |
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