UC知道帮我写篇介绍超声波的英文文章
来源：百度知道 编辑：UC知道 时间：2024/05/28 18:44:06
内容要包括
1. what is ultrasound
2. the difference between ultrasound and everyday sound waves?
3. what is a piezoelectric transducer?
4. how does a piezoelectric transducer work?
5. how dose the sound energy measured?
6. what is the attenuation of ultrasound?
7. how the reflection and transmission of ultrasound waves occur?
8. what is acoustic impendence?
9. what is the reflection coefficient?
10. how heat treatment and the destructive effects of ultrasound can be used in treatments?
谢谢，有追加
Ultrasound is acoustic energy in the form of waves having a frequency above the human hearing range.
Ultrasound is More powerful, more dangerous, more unethical.
The active element of most acoustic transducers used today is a piezoelectric ceramic, which can be cut in various ways to produce different wave modes
A transducer is a system that converts a physical chemical or any natural quantity into a desired form of energy as an indicator
sound energy is uniformly distributed throughout the. room. In this type of room, it is possible to measure.
Ultrasonic attenuation, which is the sum of the absorption and the scattering, is mainly dependent upon the damping capacity and scattering from the grain boundary in the material.
Reflection and transmission of ultrasonic waves by a layer-like region of distributed microcracks in a bulk material has been investigated.
The reflection coefficient is used in physic