@java.lang.Override
    public com.google.protobuf.DurationOrBuilder getSpeechStartTimeoutOrBuilder() {
      return speechStartTimeout_ == null
          ? com.google.protobuf.Duration.getDefaultInstance()
          : speechStartTimeout_;
    }
<pre>
Duration to timeout the stream if no speech begins.
</pre>

<code>.google.protobuf.Duration speech_start_timeout = 1;</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/StreamingRecognitionConfig.java