how to get ds age 9 to not speak so loud

[Shout]

I have had is ears tested so he's not deaf.
He just gets so excited or wants to be heard first and the level is deafening. His school report for the term suggested he should modulate his voice in class,in hotels people have knocked on the door to ask him to be quieter. I know we are not the quietest of families but he has always been exceptionally loud, yet his younger brother is fine.

What can I do to get him to remember.plus he is also a chatterbox... (no world champion at chatting) so there really isn't any respite.

That purple dinosaur used to talk about Indoor voice and Outdoor voice. Can you use that concept?

Also, does he ever get to read or speak to a large assembly of children? If he can use his terrific outdoor voice then, he should be praised. I have so often strained to hear little mousy voices against the competition of coughing, shuffling and the occasional baby crying at Parents' Assemblies.

My ds2 has a loud voice. It is difficult, you don't want to make them 'self-conscious' about it. The suggestion that he should 'modulate' his voice is pretty useless really, unless they can come up with strategies to help him to do that. I think we just have to accept that they have a 'louder' voice, although the indoor/outdoor voice idea is good.

When my dc talk too loudly, I say very quietly "why are you shouting at me?" It sometimes works.