code: def testBarkToHz(self):
      bark = 5
      expected_hz = 1960 * (bark + 0.53) / (26.28 - bark)
      self.assertAlmostEqual(expected_hz, bark2hz(bark))
  
file_path: essentia/test/src/unittests/base/test_utils.py
imports: from essentia_test import *
  import math
  import cmath
  import sys
label_desc: Use image node_id 11 for calling the TestUtils obj's underlying member method code with example usage: obj.testBarkToHz() without return types