物音一つ

a single sound

→ 物音
phrase Rare #42,142
a single sound Often used with a negative expression such as 物音一つしない or 物音一つ聞こえない to mean that not a sound can be heard.
JA: 夜の森では物音一つしなかった。
EN: There wasn't a single sound in the forest at night.

物音一つ聞こえなかった

Not a sound could be heard.

部屋には物音一つ聞こえなかった

Not a sound could be heard in the room.