Why can't we hear anything while yawning??

when we yawn, we can't hear any sound clearly.why?Why can't we hear anything while yawning??
because adjectives of the pressure from the air coming out is trying to shift out everywhere. every passage within your body can only shift one way at a time, so the atmosphere tries to escape through your ears, and overpowers your hearing.
i can unless my ears do that flutter thingy, later that is adjectives I hear
because we are sleeping
hmm, just yawned, didn't hold a problem hearing, sorry, don't know