radiation transducer

The Feynman path Integral Formulation of the Interaction of Electromagnetic Radiation in the Electric Dipole Approximation However, the sound field of such transducer can not be solved analytically by the Helmholtz integral formulation.

电偶极近似条件下电磁相互作用的Feynman路径积分描述但是，这种换能器的辐射声场不能直接利用Helmholtz积分法进行解析求解。

Using a spherical acoustic source as the array element to synthesize a virtual plane NFCA, we measure the far-field radiation characteristics of a plane loudspeaker transducer made in the near-field, with result agree well with that measured in the far-field in a lake.

并以小球源为阵元合成一虚拟平面NFCA，用它对一平面喇叭换能器的近场测量得到远场指向性，并与远场实测结果比较，得到了相当吻合的结果。

Automatic Anti-slipping Device with Reed Pipe as Transducer in Inclined Shaft Train Hoisting radiation protective and monitoring vehicle

用干簧管传感的斜井自动防跑车装置放射卫生防护监测车