소리가 너무 작거나 주파수가 범위를 벗어나 들을 수 없는.
Impossible or very difficult to hear because the sound is too quiet or the frequency is outside the range of human hearing.
예문:
"The dog whistle emits a sound that is inaudible to human ears but perfectly clear to pets."
"She spoke in such a low whisper that her words were almost inaudible over the noise of the crowd."
"The recording was so poor that most of the interview remained inaudible."