vociferation

[vəu,sifə'reiʃən]

1. a loud utterance; often in protest or opposition;: "the speaker was interrupted by loud cries from the rear of the audience"

vociferation (n.): c. 1400, from Latin vociferationem (nominative vociferatio), "a loud calling, clamor, outcry," noun of action from past participle stem of vociferari (see vociferous).