I'd love to hear from anyone who has solved this problem...
My DD has always been LOUD. Even when a baby, I found going out with her hard as she would shriek and squeal (happily). Toddlerhood, shouting and squealing continued. As she learned to talk fluently, the problem only got worse.
She's 7 in a couple of weeks and we have had a big heart to heart this evening. We had visitors earlier- met Mum's new boyfriend for the first time and she was yelling all the way through, he is a nice bloke but I didn't hear anything he said and I could see him shrinking from the noise. I told her to quieten down a few times, but after he'd gone I told her I was cross that an important moment for Grandma and me had been spoiled by "the noise" (I am careful not to say "your voice" as I don't want to destroy the poor kid).
A lot came out. She confessed that children at school run away from her with their hands over their ears. It's not so much that she talks too much (although she is a chatterbox) it's that the volume is permanently set to 11. People often step back, startled, when she starts to talk. Her hearing is fine. I am skilled in active listening, and check regularly that she knows she is being heard, so it's not an attention-grabbing thing. Even in the cinema she will yell "Pass the popcorn!" rather than whisper, even if I shushed her 30 seconds ago.
She is a gentle little soul really and very worried about what other people think of her. I can see that it's beginning to lose her friends, and that's sad. Has anyone solved this?