In an interval when the vociferator had to take breath, he asked quietly.    From Wordnik.com.  [The Lincoln Story Book] Reference

But, ideally, the boisterous vociferator or the closet anarchist is welcome with the Mad Hatters.    From Wordnik.com.  [The Shauny Chronicles : Edward Champion’s Reluctant Habits] Reference

"Hold your tongue, you fool," said the vociferator.    From Wordnik.com.  [The Cloister and the Hearth] Reference

A vociferator.    From Wordnik.com.  [Curiosities of Literature, Vol. 1 (of 3)] Reference