what is frequency heart's??
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heartbeat sound normally consists of two pulses; first heart sound (S1) and second heart sound (S2). ... Moreover, the frequency of heart sounds is low in range between 20 and 150 Hz [19]
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Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second.
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