Ultrasonic welding is a process that uses high-frequency sound waves to join materials, typically plastics or metals. The technique involves applying ultrasonic vibrations to the surfaces of the materials, which generates heat through friction. This heat softens the materials, allowing them to fuse together without the need for additional adhesives or fasteners. The process is quick and efficient, often taking just a few seconds to complete a weld. Ultrasonic welding is widely used in various industries, including automotive, electronics, and medical devices, due to its ability to create strong, reliable joints while minimizing thermal damage to the surrounding areas.