Yawning is simply a biological response of the human body for getting to inhale more and more amount of air in lungs so that the body can extract enough oxygen required by the body muscles for particular instance.
You may call it as reflex of simultaneous inhaling and stretching of ear drums. It ia also a method to vent out the excess of carbon di oxide accumulated in the body and for that expulsion the body needs to inhale a lot of oxygen, so the human has to inhale in the form of yawn.
Another Answer
In many head colds, the Eustachian tubes can become blocked from mucus and/or swelling. When this happens, the pressure difference between the middle ear and ambient atmosphere cannot equalize. Slight pressure differences are noticeable and can be annoying. Greater pressure differences can be painful.
When you yawn, the muscles in your inner ear, called the tensor tympani and stapedius, contract. This can affect the pressure in your middle ear, causing a temporary change in how you perceive sound. This is why your ears might feel like they "pop" or sound muffled during a yawn.
When you yawn, the muscles in your ears tighten, which can temporarily affect your hearing and make you feel like you are going deaf. This sensation usually goes away once the yawning stops and the muscles relax.
Possibly a ruptured drum. If you blow your nose & you can feel it in either of your ears, that is confirmation.
People don't just yawn because they're sick, first of all, they're brain sends out a message to the body, and then the body reacts as a yawn. You also yawn when you're tired, or need to lie down.
When you yawn, the muscles in your ears change position, which can temporarily affect your hearing ability.
When you yawn, the muscles in your ears stretch, which can temporarily improve your hearing by allowing more sound to enter your ear canal.
because we feel tired
When you yawn, the muscles in your ears tighten, which can temporarily affect your hearing ability. This can make it harder to hear sounds clearly while yawning.
When you yawn, your ears temporarily close off due to the contraction of muscles in the middle ear. This can prevent sound waves from reaching your inner ear, causing temporary hearing loss during a yawn.
Yawning often causes your ears to open wider, which can make sounds seem louder. When you sneeze, the sudden forceful expulsion of air can briefly block out other noises. Additionally, yawning and sneezing can both temporarily affect the pressure in your ears, which may contribute to these changes in sound perception.
Chew some gum, yawn, stretch your jaws. that usually works for me. =]
There is nothing you cannot help doing when you yawn. You do not even need to open your mouth - it is certainly possible to yawn with a closed mouth.