The idiom of ultrasonic wave is: ultra-embarrassing, ultra-dust, ultra-dust. 2. Part of speech is a noun. 3. The structure is super (semi-closed structure) sound (upper and lower structure) wave (left and right structure). 4. The phonetic notation is ㄔㄠㄕㄥㄅㄛ.5. The pinyin is, ch ā osh ē ngb not.
What is the specific explanation of ultrasound? We will introduce you through the following aspects:
I. Text Description Click here to view the details of the plan.
Ultrasonic ch ā osh Qin ngb did not. (1) sound wave with frequency higher than 20000 Hz. It is characterized by short wave length, approximately linear propagation, and less attenuation in solid and liquid than electromagnetic wave; Concentrated energy can form high-intensity and violent vibration, causing shock waves, cavitation in liquid and so on. And produce various effects such as machinery, light, heat, electricity, chemistry and biology which are widely used in modern science and technology.
Second, the national language dictionary
The frequency of sound waves that the human ear can hear is between 20 Hz and 20000Hz, so sound waves with a frequency higher than 20000Hz are called "ultrasonic waves".
Third, the network interpretation
Ultrasonic wave is a sound wave with a frequency higher than 20000 Hz. It has good directivity, strong penetration ability, easy to obtain concentrated acoustic energy and long propagation distance in water. It can be used for ranging, measuring speed, cleaning, welding, crushing, disinfection and so on. It has many applications in medicine, military, industry and agriculture. Ultrasound is named because its lower frequency limit is greater than the upper hearing limit of human beings. Scientists call the number of vibrations per second the frequency of sound, in hertz. The frequency of sound waves that our ears can hear is 20Hz-20000Hz. So we call the sound wave with frequency higher than 20000Hz "ultrasonic wave". The ultrasonic frequency usually used for medical diagnosis is 1 MHz -30 MHz. Theoretical research shows that the vibration energy of an object is proportional to the vibration frequency at the same amplitude. When the ultrasonic wave propagates in the medium, the vibration frequency of the medium particles is very high, so the energy is very large. In the dry winter in northern China, if ultrasonic waves are put into a water tank, the violent vibration will break the water in the water tank into many small drops, and then these small drops will be blown into the room by a small fan, which can increase the indoor air humidity. This is the principle of ultrasonic humidifier. Such as pharyngolaryngitis, tracheitis and other diseases, it is difficult to use blood flow to make drugs reach the affected area. Using the principle of humidifier, the curative effect can be improved by atomizing the liquid medicine and inhaling it by the patient. The huge energy of ultrasound can also make the stones in the human body violently and forcibly vibrate and break, thus alleviating the pain and achieving the purpose of healing. Ultrasonic wave is widely used in medicine, which can sterilize articles.
Vocabulary about ultrasound
Ultrasonic, ultrasonic, ultrasonic, ultrasonic, ultrasonic
Vocabulary about ultrasound
Beyond loneliness, anecdote, dust, vulgarity, the world, the world, the world, the world.
On ultrasonic sentence making
Doctors can do it. They use a special instrument or ultrasonic scaler to remove tartar and tartar.
2. Under the action of ultrasonic wave, zinc oxide powder reacts with sodium sulfide solution to prepare nano zinc sulfide.
3. The ultrasonic measurement data is correct, and the failure rate of the whole machine is lower.
4. Used in ultrasonic atomizer, humidifier and some medical devices.
5. Our company is an ultrasonic metal welding machine; Professional manufacturer of welding heads.
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