code: def testSilence(self):
      self.assertEqual(LoudnessVickers()([0] * 2000), -100)
  
file_path: essentia/test/src/unittests/temporal/test_loudnessvickers.py
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestLoudnessVickers obj's underlying member method code with example usage: obj.testSilence() without return types