The signal analysis to identify the Mercury Mercury (Murmur) has made bringing the sounds S1 and S2 in a process previously used in the comparison. The results showed that the frequency range 301 - 400 Hz has a sensitivity (SE) of 83.4 ± 4.17%, and the frequency range 401 - 500 Hz has a sensitivity (SE) of 87.3 ± 4.36%, respectively, and the specificity (SP. ) was 98.4 ± 4.92%, both the frequency itself.
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