| 扬声器阵列声波导有效辐射率分析 |
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| 引用本文： | 冯雪磊,沈勇.扬声器阵列声波导有效辐射率分析[J].电声技术,2016,40(2):19-22. |
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| 作者姓名： | 冯雪磊 沈勇 |
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| 作者单位： | 南京大学 声学研究所 近代声学教育部重点实验室,江苏 南京,210093 |
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| 摘 要： | 通常为扬声器阵列的压缩驱动单元安装声波导,以提高阵列的性能.分析了声波导的等效长度,并且提出声波导的有效辐射率这一评价指标,以反映声波导的利用率.还提出测量声波导有效辐射率的指向性拟合方法,实验表明,和原有的特定角度方法相比,指向性拟合方法更加准确可靠.
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| 关 键 词： | 声波导 有效辐射率 扬声器阵列 指向性 |
| 收稿时间： | 2015/9/28 0:00:00 |
| 修稿时间： | 2015/9/28 0:00:00 |
Analysis of active radiating factor of acoustic waveguide used in loudspeaker array |
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| Xuelei Feng and Yong Shen.Analysis of active radiating factor of acoustic waveguide used in loudspeaker array[J].Audio Engineering,2016,40(2):19-22. |
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| Authors: | Xuelei Feng and Yong Shen |
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| Affiliation: | Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University,Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University |
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| Abstract: | Acoustic waveguides are widely used with compression drives to improve the performances of loudspeaker arrays. In this paper, the equivalent length of acoustic waveguide is analyzed and the Active Radiating Factor of acoustic waveguide (ARFw) is proposed to indicate the efficiency of acoustic waveguide. The directivity-fitting method is also proposed for measuring and acquiring ARFw. The experimental results indicate that the proposed directivity-fitting method is more accurate and reliable than the traditional certain-angle method. |
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| Keywords: | acoustic waveguide active radiating factor loudspeaker array directivity |
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