code: def test_loudness_normalization_digital_silence(self):
      samples = np.zeros(8000, dtype=np.float32)
      sample_rate = 16000
  
      augment = LoudnessNormalization(min_lufs=-32, max_lufs=-12, p=1.0)
      processed_samples = augment(
          samples=samples, sample_rate=sample_rate
      )
      assert_almost_equal(
          processed_samples, np.zeros(8000, dtype=np.float32)
      )
      assert processed_samples.dtype == np.float32
  
file_path: audiomentations/tests/test_loudness_normalization.py
imports: import pytest
  import numpy
  from numpy.testing import assert_almost_equal
  from audiomentations import LoudnessNormalization
label_desc: Use image node_id 2 for calling the TestLoudnessNormalization obj's underlying member method code with example usage: obj.test_loudness_normalization_digital_silence() without return types