Grennell wrote the definitive work on Sensory-Neural-deafness. It would have been right at home in a medical journal or in the Saturday Evening Post of a generation ago.
"...you can hear the words just fine. You just can't tell WHAT words they are. Somebody will say 'Government Pension' and you will hear 'doberman pincher'......."
I ran into him years later at an NRA convention and noticed he had double miracle ear hearing aides. Asked him how they worked... " Great! I used to go to the grocery store and all I heard was &%^^&ing gibberish!" Now, I go to the grocery store and I hear LOUD &*^&%ing Gibberish!"
