M.B.
Lynelle,
His yelling/talking is not usually a symptom of teething, but of a baby exploring his voice. Some of it may be for attention, but mostly it's to see what kind of a reaction he can get from you guys. When my daughter (15 months) did/does this I just look at her say "inside voice please" in a calm tone, then go back to what I was doing. She only got loud for a few days, then realized there were other ways to get Mom's attention.
Hope this helps,
Melissa