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What is the frequency range of amplifier used for a phonocardiograph?

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in Biomedical Instrumentation by (76.4k points)
What is the frequency range of amplifier used for a phonocardiograph?

(a) less than 0 Hz

(b) 0 to 20 Hz

(c) 20 to 2000 Hz

(d) above 2000 Hz

This question was addressed to me in a national level competition.

My question is based upon Measurement of Temperature in chapter Patient Monitoring System of Biomedical Instrumentation

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The correct answer is (c) 20 to 2000 Hz

The best I can explain: The amplifier used for a phonocardiograph has wide bandwidth with a frequency range of about 20 to 2000 Hz. Filters permit selection of suitable frequency bands, so that particular heart sound frequencies can be recorded.

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