I am sure the wonderful uses lip reading, whether class-learned or self taught. He would know the strategies to use to assist his deaf ear (like where to sit, stand or what areas in a setting to avoid). He would also know enhanced listening. I teach a whole chapter on that in Lesson 2 of my soon to be released free Practical Lip Reading, co-sponsored by the Treasure Coast Chapter,
HLAA and the Fort Pierce Lions Club. One big way to help communities with hearing loss.
Learning how to really listen is helpful to anyone, but especially those who are hearing challenged. He would be well-tuned to the facial expressions and body language of others.

One thing he and others with SSHL should be very mindful of is balance. People with unassisted hearing loss are 3X more likely to fall. By not getting help for the deaf ear, he is inviting dementia up to 7 years early, as well. Untreated hearing loss presents health problems beyond the ears