My wife has learned that if she wants to discuss something when we are watching TV and I have HAs connected to the TV she has to pause the show. Then we can talk.
I have learned that if I think I hear something, and I hit Mute on the Cable box control I can hear the outside world. Last month my wife was on a business trip and I was tuned into the TV. I kept hearing something very light and I noticed my dog getting active. I Muted and then hear the building Fire Alarm system loud and clear. We were able to take action and get out until the problem was resolved.
I had not thought about that, a door knock, phone ring or other need to hear the outside world when I am in the TV world.