Tried to figure it out in public and ended up looking like an absolute fool so imma need someone to explain this to me
In: Biology
I disagree with the answers referring to drop in pressure (adiabatic effect), since the pressure difference just isn’t sufficient.
Instead, the answers around speed are more accurate. The body is pretty warm, and the more contact that the air gets with us, the warmer it gets. Even then, rapid air over the surfaces (like our mouths and throats) tends to cool them, so the slower the air is, the more chance the body can keep those surfaces warm with circulating blood.
Also, while “hoo” moves air faster, “haa” has greater turbidity around the vocal chords, which means that the air gets more stirred up and more of it gets in contact with the warm surfaces.
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