Practice helps. Fortunately fairly early on someone had the guts/kindness
to point out that nobody past row #1 could hear a word I said. I find I
can make a conscious effort to raise my voice to a "hearable" level, but it
took some time to get over the feeling that I'm yelling at the audience.
Also if there's no mike I try to remember to ask at the beginning and half
way through if the back row can hear me.
I suspect some people have voices that naturally don't carry well, and it
gets compounded by the otherwise polite inhibition against yelling at people.
Phoebe Rice
