sound 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。

Sound Field Analysis for Transducer and Array With Erose Radiating Face

不规则辐射面换能器及基阵辐射声场分析

Method The hardware design uses a P-ⅱ/ 233 multimedia microcomputer system, multi-channel A/ D converter, ECG electrodes, heart sound transducer, pulse transducer, and amplifiers and filters consisted with operation amplifiers.

【方法】本系统的硬件设计采用奔腾Ⅱ/233多媒体微机系统，多路模/数转换器和心电电极、心音传感器、脉搏波传感器及由运算放大器等构成相关的放大器及滤波器。

The vibration modes and frequencies of a free piezoelectric ceramic plate, an electro-sound combination transducer, an ultrasonic cleaner of 600W.

对自由压电陶瓷片，组合电声换能器.600W的超声清洗器。

This paper has been introduced the imcomplete superiority that layer thickness is mined coal of the checkout of application sound wave, and has gone on research, and has selected the best scheme to design and the application of imcomplete mining coal a layer thickness checkout apparatus transducer.

文介绍了应用声波检测残采煤层厚度的优越性，对残采煤层厚度检测仪换能器的设计和应用进行了研究，选择了最佳方案。