In today's world, it is nearly impossible to avoid contact with electromechanical sensors and actuators over the course of the day, although we rarely recognize them. They drive the keyless entry systems, the light switches that respond to sound or motion, the detectors in cars that determine whether seat belts are fastened and the sound‐receiving and sound‐generating parts of the telephone, to name just a few examples.
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© 1998 American Institute of Physics.
1998
American Institute of Physics
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