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This last fall roughly 14,000 people ran, swam, crawled and basically oozed their way through an obstacle course. (I even considered doing it but then I realized that I am sane).
Somehow I thought about this when listening to a student's overly noisy breath.
Noise = friction.
It's almost as if the air has to run an obstacle course to go in and come out. What we really need (low tongue, relaxed throat) is a new superhighway...