inaudible
🇺🇸
/ɪnˈɔːdəbl/
🇬🇧
/ɪnˈɔːdəbl/
too quiet or soft to be heard
The teacher's voice was so soft that it became inaudible to the students in the back of the room.
老師的聲音太輕了,以至於後排的學生聽不見。