Ultrasonic is a sound wave with a frequency higher than 20000Hz (Hertz). It has good directivity, strong reflection ability, and is easy to obtain concentrated sound energy. It travels farther in water than in air. It can be used for distance measurement, speed measurement, cleaning, and welding. , Gravel, sterilization, etc. There are many applications in medicine, military, industry, and agriculture. Ultrasound gets its name because its lower frequency limit exceeds the upper limit of human hearing.
Ultrasonic is a part of sound waves. It is a sound wave with a frequency higher than 20KHZ that is inaudible to human ears. It has something in common with sound waves, that is, they are generated by the vibration of materials and can only propagate in the medium; at the same time, it is also widespread The earth exists in nature, and many animals can transmit and receive ultrasonic waves. Among them, bats are the most prominent, which can use weak ultrasonic echoes to fly in the dark and capture food. But ultrasonic also has its special properties, such as having a higher frequency and a shorter wavelength, so it is also similar to light waves with very short wavelengths.
The frequency range of ultrasonic waves that human ears can hear is about 20Hz-20KHz. The frequency of ultrasonic is greater than the upper limit of human hearing, so it is called "ultrasonic."
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