Sunday, 1 July 2007

human biology - Why does yawning impair hearing?

When I yawn I can't hear anything happening around me. I also feel some kind of muscles inside my head contract and hear a faint hum, but it is not loud enough to explain not hearing other sounds. I can force those muscles to contract even without yawning and it produces the same effect of humming and no other sound, so I suppose they cause this effect, but how?



What really happens? What muscles do I feel?

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