I pick whisper. Shouting would be annoying to me. I don't like to shout & don't care for others shouting. It rakes on your nerves & can cause a lot of stress lol
My grandpa is deaf and I don't like shouting at him. He got a hearing aid. You know it's bad when someone has to write it down on paper so you have to read what they're trying to tell you.
I would rather whisper. If you get a sore throat or something like that, it would be hard to shout. Plus, I think whispering would be less annoying than shouting anyway.