Many presenters believe a loud voice is the way to address an audience. Booming tones are a turn-off and fly in the face of persuasion through voice.  The constant noise emanating from the drumming tones of presenters is not what audience members want.  

Loud voices are usually quite lustreless. The 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 suffering through listening.

Such inclination to presentation should be avoided.