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What is used to detect foetal heart movements in broad beam transducer?

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in Biomedical Instrumentation by (76.6k points)
What is used to detect foetal heart movements in broad beam transducer?

(a) Quartz crystal

(b) Piezo electric crystal

(c) Topaz crystal

(d) Berlinite crystal

This question was posed to me by my school principal while I was bunking the class.

My query is from Oximeters in portion Oximeters of Biomedical Instrumentation

1 Answer

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Best answer
Right option is (b) Piezo electric crystal

The best explanation: 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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