Here is OP's concern:
According to his wife, he talks too loud sometimes, so in that case, she warns him to keep his voice down:
But he doesn't believe that his voice is actually that loud and that the other people around them can hear what he's talking about:
So he decides to keep quiet whenever she says to him to keep his voice down until they get home:
"You’re probably louder than you think."
Another Redditor agreed:
One Redditor shared a similar experience and the cause of their problem:
Usually, people who talk too loud can't realize how loud they are
"I would rather be reminded about getting loud so I could learn to use my “inside voice”, " explained another Redditor
"You're an AH for being prideful and throwing a tantrum simply for being nudged about it"
Loud speaking can be physically painful to other people:
"You're getting angry at the wrong person here"
His wife is polite, he should be aware of that, also.
"YTA. Not for being loud, but how you’re reacting to your wife’s feedback."
Redditors told the OP that his voice is probably louder than he thinks. Generally, it's not a big deal, he should just lower his tone and not act childish toward his wife.
Probably Redditor had already supposed that his silence was improper, so he asked impartial people to help him decide. But since he was already in a dilemma, this advice could only help him to resolve it.