First, ultrasonic waves that vibrate more than 200,000 times per second are imperceptible to the human ear and are called ultrasonic waves. Ultrasonic waves, like ordinary sounds, can propagate in one direction and pass through objects. When encountering obstacles, it will send out echoes, and different obstacles will send out different echoes.
Based on this feature, ultrasound has been widely used, and everyone is most familiar with its application in the medical field.
Second, the application of ultrasound 1, the application in medical field.
In medicine, ultrasound can be used to detect the body. Through the contact between the detector and the human body, the electric energy is converted into ultrasonic waves. After ultrasound enters the human body, because there are many interfaces in the human body, it will be reflected, refracted and scattered after entering the human tissue, and some ultrasound will return to the detector and appear on the screen after a series of treatments.
In addition, people also use ultrasonic waves to break the liquid medicine for treating asthma into extremely fine droplets, so that the liquid medicine can easily enter the deep part of the trachea, the curative effect is greatly improved, and it is more easily absorbed by the human body. ?
2. Application in food field
Canned food can be sterilized by ultrasonic wave. Under the action of ultrasonic waves, bacteria will be killed because they can't stand strong vibration. Dismember? . Treating wine with ultrasonic wave can make wine age quickly.
After ultrasonic treatment of pork with salt, the fermentation effect can reach 1 hour for about 5 days.
3. Application in agriculture
Ultrasonic treatment can improve the germination rate and yield of seeds, because in the process of ultrasonic propagation, the chemical reaction or molecular arrangement changes due to the molecular vibration of the medium, which leads to changes in the characteristics of some substances.