IMPLEMENTASI TRANSFORMASI FOURIER CEPAT UNTUK MENGANALISIS ISYARAT SUARA JANTUNG NORMAL DAN ABNORMAL MENGGUNAKAN FETAL DOPPLER SEBAGAI ALAT PUNGUT
Abnormal heart have rumble while normal heart doesn’t it. So that abnormal heart sound cue signal has spectral values are very different when compared with normal heart sound cues. This study aims to determine the spectral values generated by sound cues normal and abnormal heart by using Fetal Doppler AngelSounds were then recorded using a personal computer and software matlab. The resulting spectral values of the cue obtained by using fast Fourier transform. Heart sound samples tested as many as 10 samples were obtained from the Hospital in Pangkalpinang Bangka. This research resulted in the value of the minimum frequency spectral include 1122.018 Hz to 870.963 Hz, the maximum frequency incrcase from 1248.820 Hz to 1248.992 Hz bandwidth of up 126.802 Hz to 378.029 Hz and a peak of 0.2368 dB to 0.0037 dB. As for the cue sound normal heart 10 samples tested cues heart sounds normal that no complaints of heart disease and produce the minimum frequency of 1122.018 Hz to 870.963 Hz, the maximum frequency of 1248.992 Hz up to 1248.820 Hz, bandwidth of 378.029 Hz to 126.974 Hz and 13.547 dB maximum peak of up to 1.582 dB.