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Which of the following transducer is used to detect foetal heart movements over a wider area?(a) piezo-electric(b) ultrasonic(c) array(d) pressureI have been asked this question in homework.This intriguing question comes from Oximeters topic in division Oximeters of Biomedical Instrumentation

Answer»

The correct option is (a) piezo-electric

To elaborate: The broad BEAM transducers are available in many configurations. The transducers COMPRISE a number of piezo-electric crystals mounted in such a way as to be able to detect foetal heart MOVEMENTS over a wider AREA.



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