1. I give my presentation today (a 40-minute talk), in about five hours.
2. I have been practicing it a lot, but busy schedule means that those practices have been compressed, at the rate of about 2-3 read-throughs a day.
3. All of my courses this semester have been discussion-based, rather than lecture courses.
Can anyone guess the problem that's arising just now?
Yep: beginning on last night's final before-bed run-through and edit-fest, I realized how tired my throat and neck muscles were. My voice has had no regular, intensive, sustained exercise since last December. I have at least one more run-through before the talk itself. And wouldn't it be hilarious if, after all this work and stress, I lost my voice halfway through the actual performance of the thing?