code: def testZero(self):
      self.assertEqualVector(
          SingleBeatLoudness(frequencyBands=[20, 150])(zeros(8192)),
          zeros(2),
      )
  
file_path: essentia/test/src/unittests/rhythm/test_singlebeatloudness.py
imports: from numpy import *
  from essentia_test import *
label_desc: Use image node_id 1 for calling the TestSingleBeatLoudness obj's underlying member method code with example usage: obj.testZero() without return types