I told a student today that I couldn't hear her. I saw her mouth moving, but my ears weren't picking up what she was saying. She looked confused until I told her that my ears only hear adult voices and can't hear whining.
Later, I was reminded that we teachers are often guilty of whining. "They make us go to four meetings a month. We only got a 2% raise. I don't have enough time to plan, to grade, to teach. They only care about the test scores."
We're a pretty whiny bunch sometimes.