Toastmasters Ottawa. YOUTHSSPEAK - PUBLIC SPEAKING COURSE. An American University (UCLA) research into communications showed that an audience is influenced by a speaker in the following percentages: - Spoken Words 7 % - Voice 38 % - Body Language 55 % ie Incredibly, Spoken Words account for only 7% of what will be believed. So how you say the spoken words is vital, in order to get your message across and believed. The Power of Oratory in the United States. Top 100 Speeches of the 20th Century by Rank.