2. A disorder characterized by a distortion in the quality of the sounds being heard; such as, musical notes: "Despite her interest in music, Nancy decided that she would not become a musician because of the dysacousia which made it too difficult for her to distinguish the musical tones."
We have two ears and only one tongue in order that we may hear more and speak less.
If you don’t want your children to hear what you’re saying, pretend you’re talking to them.
If there are any of you at the back who do not hear me, please don’t raise your hands because I am nearsighted.
[Isn't that similar to saying, "If those of you in the back can’t hear me, raise your hands"?]