Bean is noisy...

I have recently noticed that my kids is loud. Really loud. I have no idea why but he always seems to be on the verge of shouting. Listening to him "talk" is ear piercing.
I am always telling him to use his inside voice. I know he has great hearing which is why I am wondering if it has something to do with attention. I guess he figures if he yells we will listen. Anyone else have this?