fft of the signal

main.m

@@ -7,6 +7,7 @@
 %Last Modified: 20/04/23 10:08
 %
 %%%%%%%%%%%%%%%%
+pkg load signal;
 
 samplingFreq = 300; %Hz
 
@@ -23,6 +24,7 @@ figure;
 plot(t,signal)
 xlabel('Time (s)');
 ylabel('Sound (dB)');
+title('unknown Signal');
 
 blackmanWin = zeros(1, length(t));
 for l_sample=1:windowDuration*samplingFreq
@@ -45,3 +47,20 @@ end
 % plot the frequency spectrum of this windowed signal
 power_blackman = frequencySpectrum(signal_blackman, samplingFreq);
 
+
+fft_signal = fft(signal);
+size(fft_signal)
+
+figure;
+plot(t, fft_signal);
+xlabel('Time (s)');
+ylabel('Sound (dB)');
+title('FFT of signal');
+
+
+%b = fir1(600, [1/fMax, 1/fMin], 'bandpass');
+%filtered_signal = filter(b, signal);
+%figure;
+%plot(t,filtered_signal)
+%xlabel('Time (s)');
+%ylabel('Sound (dB)');