Editing Touchscreen (section)

===Surface acoustic wave===
{{Main|Surface acoustic wave}}

Surface acoustic wave (SAW) technology uses [[ultrasound|ultrasonic]] waves that pass over the touchscreen panel. When the panel is touched, a portion of the wave is absorbed. The change in ultrasonic waves is processed by the [[MIDI controller|controller]] to determine the position of the touch event. Surface acoustic wave touchscreen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen.

SAW devices have a wide range of applications, including [[Analog delay line|delay lines]], filters, correlators and [[DC to DC converter]]s.