He heard a commotion outside.

他听到外面一阵骚动。

《柯林斯英汉双解大词典》

I heard a commotion and went to see what was happening.

我听到一阵喧闹便去看看发生了什么事情。

《牛津词典》

There is a commotion out on the killing ground.

杰克突然听见了几声枪响，他转过头。 陆地上发生了一些骚动。

youdao

In the past, eager would-be Spielbergs in the audience have blocked aisles and caused a commotion.

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But the uncle didn't know what was happening and called 911 when he heard a commotion downstairs.

WSJ: Gunman in NY officer's death gets 45 years to life

Now there is a commotion, shouting, hollering, not one but a gaggle of latecomers pounding between the seats.

NEWYORKER: Amundsen