鸦雀无声 (yā què wú shēng): [lit.] crow and sparrow make no sound — Meaning & Stroke Order

When the judge announced the final verdict, the entire courtroom fell silent.

Why does everyone fall silent every time he brings up this sensitive topic?

After the movie started, the entire cinema fell silent.

The library was utterly silent late at night, with only the occasional sound of pages turning.