Ultrasound has many applications in daily life, such as using ultrasonic sonar to detect obstacles, submarines and fish, detecting internal defects of metals, using ultrasonic lithotripsy to treat gallstones and kidney calculi, and detecting other diseases in human body.

Engineering applications: underwater positioning and communication, underground resources exploration, etc. Biological applications: shearing macromolecules, bioengineering and seed treatment.

Diagnostic applications: A-type, B-type, M-type, D-type, dual-function and color Doppler ultrasound, and therapeutic applications: physiotherapy, cancer treatment, surgery, extracorporeal lithotripsy, dentistry, etc.

Extended data

Characteristics of ultrasonic wave:

1. When ultrasonic wave propagates, it has strong directivity and easy energy concentration.

2. Ultrasonic waves can propagate in different media and far enough.

3. The interaction between ultrasonic wave and sound transmission medium is moderate, and it is easy to carry the information of sound transmission medium state (diagnosis or function of sound transmission medium). (treatment)

4. Ultrasonic wave is a waveform, which can be used as a carrier or medium for detection and load information (such as B-ultrasound for diagnosis); At the same time, ultrasound is a form of energy. When its intensity exceeds a certain value, it can affect, change or even destroy the state, nature and structure of the medium that propagates ultrasonic waves (used for treatment).

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