I once sat next to Danny Spooner in the back of a noisy pub with a ceiling beam that made it very hard to be heard unless you stood under the beam at the center of the room.
   The circle came round to Danny and I told him he ought to go up to "the spot". He didn't answer, but just leaned forward and started a chanty........and it was suddenly quiet all the way to the front window as he made himself heard everywhere!
   I'm not sure such power can be emulated without a certain build... and Danny had a barrel chest and years of exercising it.
Of course, there are techniques for 'projecting' to YOUR best... but some people just have it.

   I went to the sea music festival at Mystic Seaport one year and heard 2 people discussing giving directions about how to get there.
One said,"I just tell people to drive north on I-95 until you hear Don Sineti's voice, then turn right." Don was built much like Danny Spooner, and the joke about directions was not far off!