Many presenters err in believing that a loud voice is the way to go when addressing an audience. In fact, booming tones are a turn-off and fly in the face of persuasion through the use of voice. The incessant noise that can emanate from the drumming tones of presenters, is not what audience members want.
Loud voices are usually quite lustreless. Tone is sacrificed to the volume of delivery. Using a constantly loud voice may convince the speaker of personal importance. Yet the opposite opinion is evoked as a reaction from those who have to suffer through the listening.
Such inclination to presentation should be avoided.