方环活塞声源辐射声场的指向性  

The Directivity of Acoustic Field Radiated from Quadrate Ring Piston Source

作　　者：郑珂[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《陕西教育学院学报》2008年第1期104-106,共3页Journal of Shaanxi Institute of Education

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。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.

关 键 词：方环活塞声源 辐射声场 指向特性 

分 类 号：O426.1[理学—声学]