code: def test_amplitude_to_db(self):
      sample_rate = 8000
      transform = T.AmplitudeToDB()
      waveform = get_whitenoise(
          sample_rate=sample_rate, duration=0.05, n_channels=2
      )
      self.assert_grad(transform, [waveform])
  
imports: import unittest
  from typing import List
  import torch
  import torchaudio.transforms
  from parameterized import parameterized
  from torch.autograd import gradcheck, gradgradcheck
  from torchaudio_unittest.common_utils import get_spectrogram, get_whitenoise, nested_params, rnnt_utils, TestBaseMixin
label_desc: Use image node_id 15 for calling the AutogradTestMixin obj's underlying member method code with example usage: obj.test_amplitude_to_db() without return types