を開ける音

the sound of opening

→ を

phrase Rare #42,159

the sound of opening Used in parentheses to describe a sound effect, often in subtitles, manga, or written descriptions. The noun before を specifies what is being opened.

JA: （窓を開ける音）

EN: (The sound of opening a window)

（カーテンを開ける音）

(The sound of curtains opening)

— 映画聲の形 (2016)

（鍵を開ける音）

(The sound of a lock being unlocked.)

— バトル・ロワイアル (2000)