【摘要】 依据本文构造的组合圆形活塞声源,导出了该声源远场指向性公式,并对其正确性和有效性进行了仿真研究。仿真果表明:这种结构的组合声源,不仅能有效地抑制副极大,减小主瓣宽度;而且所有声频均有指向性,声频愈高,指向性愈强。更多还原

【Abstract】 A built-up circular piston sound source is established in this paper. The directivity formula of its far field is obtained, and its validity is simulated. As a result, the sound source not only can suppress effectively side lobe and reduce the width of main lobe, but also has its directivity at any acoustic frequency. The higher the acoustic frequency is, the stronger its directivity is.更多还原