believe one's ears

believe one's ears  {v. phr.}
1. To believe what one hears; trust one's hearing. — Used with a negative or limiter, or in an interrogative or conditional sentence.
He thought he heard a horn blowing in the distance, but he could not believe his ears.
2. To be made sure of (something).
Is he really coming? I can hardly believe my ears.
Categories: {v. phr.}