@java.lang.Override
  public int getNaturalSampleRateHertz() {
    return naturalSampleRateHertz_;
  }
<pre>
The natural sample rate (in hertz) for this voice.
</pre>

<code>int32 natural_sample_rate_hertz = 4;</code>

@return The naturalSampleRateHertz.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Voice.java