My nieces grab me by the arm, turn me to face them, and speak loudly. Because I don't hear a damn thing they say. Lip reading works.
/johnny
Once heard a story about an elderly Navy radio operator vet who had a bad stroke and could not speak. A young doctor (who was a Ham) heard him beating CW out with a spoon on the side of a wheel chair. When he realized what was happening, he furnished him a key, and the young doctor could not keep up with the old guy. The mind is an amazing device.