code: def test_vad(self, filename):
      path = get_asset_path(filename)
      data, sample_rate = load_wav(path)
      result = T.Vad(sample_rate)(data)
      self.assert_sox_effect(result, path, ["vad"])
  
file_path: audio/test/torchaudio_unittest/transforms/sox_compatibility_test.py
imports: import warnings
  import torch
  import torchaudio.transforms
  from parameterized import parameterized
  from torchaudio_unittest.common_utils import get_asset_path, get_whitenoise, load_wav, save_wav, skipIfNoExec, skipIfNoSox, sox_utils, TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 6 for calling the TestFunctionalFiltering obj's underlying member method code with example usage: obj.test_vad(filename) without return types