A CDE Definition
The bonding of materials, typically made of plastic, by pressing them together and vibrating them at ultrasonic speeds for a fraction of a second. It is a very fast, very clean way to combine objects together. First used to bond toy parts in the 1960s and widely used in the automobile industry starting in the 1980s, ultrasonic welding is used to weld myriad plastic elements together. See ultrasonic.
Bonding Plastic Parts
Sound waves that are beyond the audible hearing range; typically above 20 kilohertz (20,000 Hz). Ultrasonic techniques are found in medicine, which use ultrasound waves to echo back an image of a fetus or internal organ, as well as to administer therapy to various parts of the body. Contrast with infrasonic. See ultrasonic welding and saser.
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