code: def testDifferentFrequencies(self):
      # loudness of a 1000Hz signal should be higher than the loudness of a
      # 100 Hz signal
      from math import sin, pi
  
      sr = 44100
      size = 1 * sr
      sine1 = [sin(2.0 * pi * 100.0 * i / sr) for i in range(size)]
      sine2 = [sin(2.0 * pi * 1000.0 * i / sr) for i in range(size)]
      fc1 = FrameCutter()
      fc2 = FrameCutter()
      frame1 = fc1(sine1)
      frame2 = fc2(sine2)
      while len(frame1) != 0 and len(frame2) != 0:
          self.assertTrue(
              LoudnessVickers()(frame1), LoudnessVickers()(frame2)
          )
          frame1 = fc1(sine1)
          frame2 = fc2(sine2)
  
file_path: essentia/test/src/unittests/temporal/test_loudnessvickers.py
imports: from essentia_test import *
label_desc: Use image node_id 5 for calling the TestLoudnessVickers obj's underlying member method code with example usage: obj.testDifferentFrequencies() without return types