| 指向性声源的自由空间有源消声 |
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| 引用本文： | 侯宏, 王冲, 杨建华, 孙进才. 指向性声源的自由空间有源消声[J]. 声学学报, 1995, 20(3): 191-198. DOI: 10.15949/j.cnki.0371-0025.1995.03.005 |
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| 作者姓名： | 侯宏 王冲 杨建华 孙进才 |
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| 作者单位： | 西北工业大学声学工程研究所 |
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| 摘 要： | 本文根据最小辐射声功率准则，推导了当初级源和次级源的声辐射均具有指向性时，次级源最优复强度的一般表达式.分析结果表明该式具有普遍性。文中最后讨论了几种典型和常见的声源结构有源消声的特点，给出了次级源最优复强度及消声前后辐射功率比的表达式。
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| 收稿时间： | 1993-06-30 |
Active sound control by diectional secondary sources in the free field |
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| HOU Hong, WANG Chong, YANG Jianhua, SUN Jincai. Active sound control by diectional secondary sources in the free field[J]. ACTA ACUSTICA, 1995, 20(3): 191-198. DOI: 10.15949/j.cnki.0371-0025.1995.03.005 |
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| Authors: | HOU Hong WANG Chong YANG Jianhua SUN Jincai |
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| Abstract: | In this paper, a general formula for caculating the complex strengths of secondary sources is derived according to the criterion of minimizing the total acoustic power output while both of primary and secondary sources are with difectivity. Analytic results show that the formula is of universal significance. In the last, the specific properties are presented for some typical secondary sources commonly used in active sound control, and these results are shown in figures. |
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