@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + AUDIO_ENCODING_FIELD_NUMBER;
    hash = (53 * hash) + audioEncoding_;
    hash = (37 * hash) + SAMPLE_RATE_HERTZ_FIELD_NUMBER;
    hash = (53 * hash) + getSampleRateHertz();
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Optional. The synthesis sample rate (in hertz) for this audio.
</pre>

<code>int32 sample_rate_hertz = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The sampleRateHertz.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/StreamingAudioConfig.java