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Introduction
The Self-Calibrating Auditory Tone Infrared (SCATIR) Switch is a multi-
purpose momentary-contact optical switch with auditory feedback designed for
use by persons who experience difficulty in activating mechanical switches. It
works by detecting a beam of reflected pulsed infrared light. It is suitable for use
with a variety of movements, including eye-blink, eyebrow movement, finger
movement, head movement or facial muscle movement. The controlling body
part does not need to be in physical contact with the switch sensor.
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