Ultrasound is a sound wave with a frequency higher than 20000 Hz, which is usually inaudible to the human ear. Ultrasound has good directivity, strong penetrating ability, easy to obtain concentrated sound wave energy, and spreads far in the water. Because of these characteristics, ultrasound is widely used in daily life, and can be used for distance measurement, speed measurement, cleaning, welding, stone crushing, sterilization and disinfection.
>20-01-2021