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I know as a teacher I drink 80 ounces of water as I don’t have an overly strong voice naturally, and my throat does get sore on any given day just from presenting lessons and such. This last few weeks when we still had school I had my class do an experiment. They took a black piece of paper and went from quietly talking, to talking louder, finally a pretend cough all while looking at what was happening on the paper as water drops obvious on dry black construction paper. Hence a way to drive home quiet voices. Louder you get, the more stuff comes out of your mouth.Agree, any person practicing singing is constantly clearing their throat/coughing. Not a single person in a full choir coughing during a singing session is darn near impossible. Furthermore, the more you sing or even just talk for long stretches, the more prone you become to saliva accidentally flying out of your mouth, especially when making the F, S, or T sounds, which requires you to secrete air forcefully. I frequently have to give presentations, and one of the first things I make sure I always have is drinking water nearby, because as your mouth gets dry, not only does it become harder to talk and your throat starts to hurt, but pockets of saliva also start to build around the dryness and come out of your mouth.
There was microscopic saliva specks all over that place; it is unavoidable in that setting.