code: def _write_audio_files_in_dir(self, dir_path):
      from scipy.io import wavfile
  
      file1 = dir_path + "/1.wav"
      file2 = dir_path + "/2.wav"
      wavfile.write(file1, self.sample_rate1, self.noise1)
      wavfile.write(file2, self.sample_rate2, self.noise2)
      return file1, file2
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from .util import TempDirectory
  from copy import copy
  import math
  from os import mkdir
  import unittest
  import pytest
  import numpy
  import sys
  import turicreate
  from turicreate.toolkits._internal_utils import _raise_error_if_not_sarray
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _mac_ver
label_desc: Use image node_id 9 for calling the ReadAudioTest obj's underlying member method code with example usage: obj._write_audio_files_in_dir(dir_path) and returns: file1,  file2