I hope you know that my name is actually 'Huh?' That is what my husband calls me. I could be the only one in a room with nothing else going on and ask him something and he says, "Huh?"
Why is this? Is he daydreaming, is his hearing failing, or could he be wife deaf. I think it is the latter. We could be discussing a topic until I ask him a question, then he says "Huh?"
Some people only hear what they have just said and to hear another person interject into their statement can seem unbelievable to the speaker. It is almost like, What, there's another person in my realm? or Who said that? It can be frustrating to those near him.
So aside from beating a drum or yelling his name, I will continue to be clear as I can while invoking tolerance and patience. After all, I have been married to this man for 47 years. "Huh? Yes, dear.