@java.lang.Override
  public int getMicrophoneDistanceValue() {
    return microphoneDistance_;
  }
<pre>
The audio type that most closely describes the audio being recognized.
</pre>

<code>.google.cloud.speech.v1.RecognitionMetadata.MicrophoneDistance microphone_distance = 4;
</code>

@return The enum numeric value on the wire for microphoneDistance.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/RecognitionMetadata.java