LibGdx如何仅在演员之间开始重叠时播放声音？

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.audio.Sound;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Intersector;
import com.badlogic.gdx.math.Rectangle;

public class MyGame extends Game {
    private SpriteBatch batch;
    private Texture actorTexture;
    private Actor actor1;
    private Actor actor2;
    private Sound collisionSound;

    @Override
    public void create() {
        batch = new SpriteBatch();
        actorTexture = new Texture("actor.png");
        actor1 = new Actor(actorTexture, 100, 100);
        actor2 = new Actor(actorTexture, 200, 200);
        collisionSound = Gdx.audio.newSound(Gdx.files.internal("collision.wav"));
    }

    @Override
    public void render() {
        // 游戏逻辑更新
        update();

        // 渲染画面
        batch.begin();
        actor1.draw(batch);
        actor2.draw(batch);
        batch.end();
    }

    private void update() {
        // 碰撞检测
        Rectangle actor1Bounds = actor1.getBounds();
        Rectangle actor2Bounds = actor2.getBounds();
        if (Intersector.overlaps(actor1Bounds, actor2Bounds)) {
            playCollisionSound();
        }
    }

    private void playCollisionSound() {
        collisionSound.play();
    }

    @Override
    public void dispose() {
        batch.dispose();
        actorTexture.dispose();
        collisionSound.dispose();
    }
}