What is ultrasonic ？

Ultrasonic wave is an example of all types of sounds that humans cannot hear. Its high-frequency sound waves are silently applied in industry and medicine. Sound waves are defined by their frequency (number of waves per second). For instance, the range of ultrasonic waves is from 20 kHz to 1 GHz. Frequencies from 20 kHz to 70 kHz are used for ultrasonic welding. In the lowest range, the human ear can hardly perceive it either. Because the range of audible sounds is only from 16 Hz to 20 kHz. Vibrations above this are at best perceived as tremors. This is achieved by converting high voltage from a generator into mechanical vibrations (ultrasonic waves). Then the welding head transmits these into the components to be welded. The vibrations generate frictional heat, and the material begins to melt.All applications