Long time no see!
My blind Doxie Nono is almost 14-yrs. Her hearing is going. Especially, her right ear seems to be almost deaf.
She has trouble distinguishing verbal cues. But the sounds of clicker, finger-snapping, hand-clapping are still clear for her. I have taught her several touch/tactile cues. Those are very useful to help us communicate and have fun
You can replace the touch/tactile cue with verbal cue or teach also verbal cue. If you want it or you are unfamiliar with clicker training, please talk to a dog trainer using positive reinforcement/clicker in your local.