Note

Click here to download the full example code

STFT of an Audio SignalΒΆ

Figure 3.4 from the tutorial.

Squared modulus of the STFT of the word GABOR
from os.path import dirname, abspath, join
from scipy.io import loadmat
import numpy as np
import matplotlib.pyplot as plt

DATA_PATH = join(abspath(dirname("__file__")), "data", "gabor.mat")
signal = loadmat(DATA_PATH)['gabor'].ravel()
tfr = loadmat(DATA_PATH)['tfr']
time = np.arange(338)
freq = np.arange(128, dtype=float) / 256.0 * 1000

plt.contour(time, freq, tfr)
plt.grid(True)
plt.xlabel('Time  [ms]')
plt.ylabel('Frequency  [Hz]')
plt.title('Squared modulus of the STFT of the word GABOR')
plt.show()

Total running time of the script: ( 0 minutes 0.146 seconds)

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