本文主要是对用电磁声换能器，通过测量超声波幅度变化来测量铁磁性材料内部应力的方法进行实验研究。
The stress in ferromagnetic materials was studied by measuring the change of the amplitude of ultrasonic wave with electromagnetic acoustic transducers.
该机构还发出光，声，热，电磁场，象所有其他物质，它有一个引力场。
The body also emits light, sound, heat, and electromagnetic fields and, like all other matter, it has a gravitational field.
为了模拟薄膜声体波谐振器(FBAR)的电磁场(EM)分布特性，提出了一种新的FBAR建模方法。
For simulating the electromagnetic (EM) distribution of thin film bulk acoustic resonators (FBAR), a new FBAR modelling method was proposed.
列出常见和特殊的声、电磁噪声来源，严重的振颤，腐蚀源以及所有有可能影响正常测量的干扰因素。
List normal and special sources of acoustic or electromagnetic noise, serious vibration, sources of corrosion, and any other significant interfering parameter that might prevent successful measuring.
描述：PC透明材料制成，适用于无线电射频电磁，声磁系统。
Description: made of PC transparent material; used in em, RF and AM system.
描述：PC透明材料制成，适用于无线电射频电磁，声磁系统。
Description: made of PC transparent material; used in em, RF and AM system.
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