For an example, My sister is extremely HOH but refuses to address it.
Now we are the only 2 in the entire family that were born with hearing issues and the whole family knows it.
Now My dad understands completely I am completely deaf without my CI's on and he works on talking to me when i do go deaf for the day or so, he also respects that when i do wear them its another world for me.
My mom on the other hand yells, when I go full deaf she thinks yelling I can hear her???? nope.
she is used to yelling to my sister and when I have my CIs on i ask her to quiet down or quit yelling and she gets a pissy mood and yells louder that she isnt yelling when she is, even my daughter and nephews have told her she is yelling but all that does it piss her off more and she yells louder so I take the CI's off and ignore her/
So you have people who understand and those who dont.
Such as when i worked for the Government, My co-workers would raise their voices for me to hear them, when they went home their families would tell them to stop yelling just because they spent the day with me on a jobsite it became a natural thing for them, at work... at home it was a different story.