Why do I lose my hearing when I yawn?

A masterful muscle that longs to be deafening only on our part.

This is due to a muscle in your middle ear that is attached to the small bone that transmits sound from your eardrum. The muscle automatically contracts to reduce our hearing sensitivity in response to a sudden loud sound like thunder, and it also contracts when we chew, so the sound of our jaw muscles isn't deafening. Yawning also contains jaw movements that stimulate the temporal muscle, so one side effect is that we sniff while yawning.