| 方环活塞声源辐射声场的指向性 |
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| 引用本文： | 郑珂.方环活塞声源辐射声场的指向性[J].陕西教育学院学报,2008,24(1):104-106. |
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| 作者姓名： | 郑珂 |
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| 作者单位： | 陕西师范大学应用声学研究所,陕西,西安,710062 |
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| 摘 要： | 利用瑞丽积分，计算了方环活塞声源远场的辐射声压分布以及指向性公式，并对辐射声压的远场指向性进行了分析；同时，与方形活塞声源的指向性作了对比。结果表明，当方环活塞的尺寸一定时，辐射频率增大，辐射声场指向性增强；辐射频率和内边长一定时，随活塞外边长增大，辐射声场指向性仍增强；辐射频率和外边长一定时，随活塞内边长增大，辐射声场指向性增强。在同一声波频率以及相同尺寸的情况下，方环活塞声源要比方形活塞声源的远场指向性更尖锐。
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| 关 键 词： | 方环活塞声源 辐射声场 指向特性 |
| 文章编号： | 1008-598X(2008)01-0104-03 |
| 修稿时间： | 2007年11月15 |
The Directivity of Acoustic Field Radiated from Quadrate Ring Piston Source |
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| ZHENG Ke.The Directivity of Acoustic Field Radiated from Quadrate Ring Piston Source[J].Journal of Shaanxi Institute of Education,2008,24(1):104-106. |
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| Authors: | ZHENG Ke |
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| Institution: | ZHENG Ke (Applied Acoustics Institute, Shaanxi Nomal University, Xi＇an 710062, China) |
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| Abstract: | In this paper, the radiation pressure and directional formulation are calculated by use of Reily-integrate, The directivity of radiated sound field of quadrate ring piston is analyzed. At the same time, a contrast with the directivity of quadrate piston is made. The result shows that the directivity intensifies with the increases of each parameter of quadrate ring piston under different conditions respectively. At the same value of frequency and size, the directivity of quadrate ring piston is sharper than that of quadrate piston. |
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| Keywords: | quadrate ring piston source acoustic field directivity character |
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