fs = 100
T = 1
y, _ = sin(f=10.2, T=T, fs=fs)
for f_2 in np.linspace(11.4, 15.5, 9):
t = np.arange(0, T, 1 / fs)
y_2, _ = sin(f=f_2, T=T, fs=fs)
s = y_2 + y
S, F = spect_dB(s, len(s), fs)
hann_win = signal.windows.hann(len(t))
hann_win = s * hann_win
S_wnd_hann, F_hann = spect_dB(hann_win, len(s), fs)
hamming_win = signal.windows.hamming(len(t))
hamming_win = s * hamming_win
S_wnd_hamming, F_hamming = spect_dB(hamming_win, len(s), fs)
blackman_win = signal.windows.blackman(len(t))
blackman_win = s * blackman_win
S_wnd_blackman, F_blackman = spect_dB(blackman_win, len(s), fs)
plt.figure()
plt.plot(F, S, label='Rectangle')
plt.plot(F_hann, S_wnd_hann, label='Hann')
plt.plot(F_hamming, S_wnd_hamming, label='Hamming')
plt.plot(F_blackman, S_wnd_blackman, label='Blackman')
plt.legend()
plt.show()
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