| 有限大障板上轴对称扬声器声压级的近似计算方法 |
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| 引用本文： | 徐楚林,陆晓,温周斌,胡长青. 有限大障板上轴对称扬声器声压级的近似计算方法[J]. 声学技术, 2016, 35(1): 49-52 |
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| 作者姓名： | 徐楚林 陆晓 温周斌 胡长青 |
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| 作者单位： | 中国科学院大学, 北京 100190;浙江中科电声研发中心, 浙江嘉善 314100;中国科学院大学, 北京 100190;中国科学院大学, 北京 100190;中国科学院声学研究所东海研究站, 上海 200032;中国科学院声学研究所东海研究站, 上海 200032 |
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| 摘 要： | 扬声器声压级测试一般是将扬声器安装在矩形标准障板上进行的,而要通过仿真分析方法准确计算该扬声器在这种声场条件下的声压级,以往只能采用3D模型,其计算量非常大。提出了一种近似计算方法,将有限大障板近似为很多个扇形障板块的组合,再利用2D轴对称模型的仿真分析方法计算每个扇形障板块影响下的声压,进而得到轴对称扬声器安装在该有限大障板上的声压级。这种方法使仿真分析模型与实际测试相符合,同时也避免了规模庞大的3D仿真计算。
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| 关 键 词： | 扬声器 仿真计算 标准障板 2D轴对称 扬声器测试 |
| 收稿时间： | 2015-08-04 |
| 修稿时间： | 2015-11-30 |
An approximate SPL calculation method for axisymmetric loudspeaker mounted on finite baffle |
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| XU Chu-lin,LU Xiao,WEN Zhou-bin and HU Chang-qing. An approximate SPL calculation method for axisymmetric loudspeaker mounted on finite baffle[J]. Technical Acoustics, 2016, 35(1): 49-52 |
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| Authors: | XU Chu-lin LU Xiao WEN Zhou-bin HU Chang-qing |
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| Affiliation: | University of Chinese Academy of Sciences, Beijing 100190, China;Zhejiang Electro-Acoustic R&D Center, Chinese Academy of Sciences, Jiashan 314100, Zhejiang, China;University of Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100190, China;Shanghai Acoustic Laboratory, Chinese Academy of Sciences, Shanghai 200032, China;Shanghai Acoustic Laboratory, Chinese Academy of Sciences, Shanghai 200032, China |
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| Abstract: | Loudspeaker is commonly mounted on a finite baffle in SPL (sound pressure level) measurement. Formerly, a 3D model must be used for accurate SPL simulate calculation under this acoustic field, which spends huge computation time. An approximate method is proposed, in which the finite baffle is divided into many circulator sectors, then the SPL of the loudspeaker with every circulator sector baffle is calculated by using 2D axisymmetric simulation, and the SPL of the loudspeaker mounted on the finite baffle is finally obtained by combining these 2D simulation results. This method can effectively reduce the difference between simulate calculation and actual measurement. Moreover, the costly 3D model simulation is avoided. |
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| Keywords: | loudspeaker simulation standard baffle 2D axisymmetric loudspeaker measurement |
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