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transducer
has definitions from the field of physics
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[ noun ] (physics) an electrical device that converts one form of energy into another
Used in print (Walter H. Buchsbaum, "Advances in Medical Electronics"...)Sonar can be used to measure the thickness of the heart by placing small crystal transducers at opposite sides of the heart or blood_vessel and exciting one with some pulsed ultrasonic energy . It is also possible to utilize a pressure transducer , mounted at the end of a catheter which is inserted into the heart 's left_ventricle , to indicate the blood_pressure in the heart itself . In this novel arrangement the `` pill '' is much smaller and contains only a resonant circuit in_which the capacitor is formed by a pressure sensing transducer . In medicine the frequencies are much higher , transducers and the sonar beams themselves are much smaller , and different scanning techniques may be used , but the principles involved are the same as in sonar . The transducer is coupled to the body through a water bath , not shown . |
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