The participant will try to act like Abraham Lincoln and pronounce loudly and clearly as if he was in a wide open area.
Help the person speak clearer and project their voice throughout a larger area.
A useful tool in teaching voice projection is to share the tricks that speakers employed before modern microphones and sound equipment. Abraham Lincoln's famous "Gettysburg Address" is one of history's most famous speeches. Lincoln used projection and enunciation from atop a hill to clearly deliver the speech. Have each person stand on stage and deliver the first phrases of the address, focusing on sounding out the long vowels and each phrase loudly and clearly.