How to playback audio (.WAV file) by using openal.world file?

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The openal.world file includes <audio_source> and <audio_sink> for two models respectively. the collision could trigger audio playback. the original file is below:

<?xml version="1.0" ?>
<sdf version="1.5">
  <world name="default">
    <include>
      <uri>model://ground_plane</uri>
    </include>
    <include>
      <uri>model://sun</uri>
    </include>
    <audio>
      <device>default</device>
    </audio>
    <model name="box">
      <pose>0 0 10.5 0 0 0</pose>
      <link name="link">
        <collision name="collision">
          <geometry>
            <box>
              <size>1 1 1</size>
            </box>
          </geometry>
        </collision>
        <visual name="visual">
          <geometry>
            <box>
              <size>1 1 1</size>
            </box>
          </geometry>
          <material>
            <script>Gazebo/WoodPallet</script>
          </material>
        </visual>
        <audio_source>
          <uri>file://media/audio/cheer.mp3</uri>
          <pitch>2.0</pitch>
          <gain>1.0</gain>
          <loop>false</loop>
          <contact>
            <collision>collision</collision>
          </contact>
        </audio_source>
      </link>
    </model>
    <model name="sphere">
      <pose>0 1.5 0.5 0 0 0</pose>
      <link name="link">
        <audio_sink />
        <collision name="collision">
          <geometry>
            <sphere>
              <radius>0.5</radius>
            </sphere>
          </geometry>
        </collision>
        <visual name="visual">
          <geometry>
            <sphere>
              <radius>0.5</radius>
            </sphere>
          </geometry>
          <material>
            <script>Gazebo/WoodPallet</script>
          </material>
        </visual>
      </link>
    </model>
  </world>
</sdf>

I don't know why I can't hear any sound after one object collide with another object, and I have tried to move the object around the plane, but it still has no sound. PS: the headset is no problem.

It would be grateful if someone can tell me how to play audio files in Gazebo by using OpenAL.

Thanks in advance.