class_docstr: Test the PsychoacousticMasker.
class_docstr_tok: ["Test","the","PsychoacousticMasker","."]
code: def test_calculate_individual_threshold(self, art_warning, mocker):
      try:
          test_masker_idx = np.array([2, 5, 7, 9])
          test_maskers = np.array([96, 40, 60, 9])
  
          masker = PsychoacousticMasker()
          threshold = masker.calculate_individual_threshold(
              test_maskers, test_masker_idx
          )
  
          assert threshold.shape == test_masker_idx.shape + (
              masker.window_size // 2 + 1,
          )
      except ARTTestException as e:
          art_warning(e)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import numpy
  import pytest
  from art.attacks.attack import EvasionAttack
  from art.attacks.evasion.imperceptible_asr.imperceptible_asr import ImperceptibleASR, PsychoacousticMasker
  from tests.utils import ARTTestException
label_desc: Use image node_id 4 for calling the TestPsychoacousticMasker obj's underlying member method code with example usage: obj.test_calculate_individual_threshold(art_warning, mocker) without return types