Why do you hear that crackling noise in your ears when you swallow or yawn?
79222
Those noises indicate the adjustment of the pressure inside your middle ear. \nThe middle ear cavity is separated from the exterior by the tympanic membrane, and the only connection of the middle ear with the exterior is by means of a duct connecting this cavity with the back of the nose (the Eustachian tube). This duct regulates the passage of air and is usually closed.\nNow, if the difference between the internal and external pressures becomes too high, the eardrum becomes too tense and does not vibrate adequately, thus sound reception becomes poorer.\nWhen you hear those noises it means that the pressures have been equalized by air entering the middle ear through the Eustachian tube, which is opened by muscles in the throat and palate that contract when swallowing and yawning.\nHowever, permanent/loud/unusual noises could indicate some blockage of the Eustachian tubes; better see a doctor about it.
122419
The "rumble" or "growl" sometimes heard from the stomach is a normal part of digestion. It originates in the stomach or upper part of the small intestine as muscles contract to move food and digestive juices down the gastrointestinal tract.
790139
Not completely. There is a connection between the ear, nose and throat (ENT). That's why there is a specialty called ENT Surgery or Otorhinolaryngology. When yawning, your eustachian tube is closed and due to pressure differences between your middle ear and outer ear, the ear drum is partially/temporarily displaced. This makes sound vibrations not easily detectable. Try flying in a pressurized aircraft cabin and experience this. Try also tha valsalva maneouvre.
397407
Though the other answers are right (that yawning occurs to signal tiredness when the brain demands extra oxygen due to slipping performance), I would like to add another related comment.\n\nI recently read in the newspaper that scientists are discovering that yawning is a signal of compassion.  Researchers conducted studies in which participants watched videos of people yawning and the researchers measured the time between the yawn of the person on the video and the ensuing yawn of the study participant.  They then somehow effectively linked this elapse to compassion; what they stated was that the quicker you yawn after you see someone else yawn, the the more compassionate you are.\n\nRegretfully, I don't know the web address of the article, which I found intriguing, but I think it is worth your time to investigate.
276956
When working out the blood flow is increased to the working muscles. As a result there is less blood and oxygen flowing to the brain triggering the yawn. This is your body's way of increasing the oxygen level in the brain to compensate.\nAs your body accomodates the increased physical demand, the yawning should become less.
40340
An indication of tiredness, stress, over-work or boredom. \nAn action indicating psychological decompression after a state of high alert. \nA means of expressing powerful emotions like anger, rejection or apathy. \n\nYou see someone yawning.  You hear someone yawning.  You read about yawning. You think about yawning. \nNow, you want to yawn. If this describes you, then you have just "caught" a yawn. Between 40 and 60% of the population is susceptible to contagious yawns, but the reason why yawns are catching is unknown. Steven Platek, Ph.D. suggests that being aware of one's own mental state ("self-recognition") and the ability to see things from another person's point of view ("mental state attribution") may make people susceptible to contagious yawns.
716830
The popping noise is actually gas escaping from your joints. It builds up in the cartilage and is released when they are hyperextended (Over extended than they would be normally). The wive's tale is that this leads to arthritus and large joint bones. There is no evidence to prove this, because it's just a simple gas release. You can only do it once every fifteen minutes (Approximately), due to the time needed for the gas to settle back between your bones.
674124
eat a few baking soda crackers, I have heard that they prevent that sound because your stomach has them to "chew" on. That sound is the entrance and exit to your stomach opening and closing on nothing, so if you put some crackers in there it won't make that sound.
317540
A Yawn is the brain's natural way of rapidly increasing the amount of oxygen taken into the lungs for use by the body during times of fatigue. It is triggered by very delicate mental cues and accordingly, can be triggered by seeing someone else yawn or even thinking about yawning long enough.
304281
it has to do with the position we are in...the soft tissue in the back of the throat, and on the pallete shifts and obstructs the airways, some, and i read that the pallete vibrates with the air flow, causing some of it...this is why too when you are stuffed up you may snore more, because the airways are blocked..more air being forced through a smaller space causes the noise
649042
its your heart beating,\nif you hear it really often it could be a sign of anemia. which is easily treated.
190729
When healthy people are over-tired or over-heated, they also may hear a pulse beat in the ear. Remember that the carotid arteries, which are big blood vessels carrying blood from your heart to your brain, run on either side of your neck, close to your ears. \n\nBecause you have some hearing loss, you may not hear external sounds around you as well, which make you more aware of "inner" noise, such as your pulse. A hearing aid could make a difference for you. \n\nIn addition, if your nose is very congested, pressure can build up in your Eustachian tubes, which connect the back of the nose and throat to the ears. Taking a decongestant or blowing your nose often might decrease the intensity of the pulse.  http://healthlink.mcw.edu/article/901226039.html
795498
if you have allergies, it could just be fluid buildup, especially if you sleep on the side...\n\nalso, if hear clicking in your jaw, then it is TMJ
414151
What's behind this mysterious epidemic of yawning? First, let's look at what a yawn is. Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We know it's involuntary because we do it even before we are born. Research shows that 11-week-old fetuses yawn. \n\nThere are many parts of the body that are in action when you yawn. First, your mouth opens and jaw drops, allowing as much air to be taken in as possible. When you inhale, the air taken in is filling your lungs. Your abdominal muscles flex and your diaphragm is pushed down. The air you breath in expands the lungs to capacity and then some of the air is blown back out. \n\nWhile the dictionary tells us that yawning is caused by being fatigued, drowsy or bored, scientists are discovering that there is more to yawning than what most people think. Not much is known about why we yawn or if it serves any useful function, and very little research has been done on the subject. However, there are several theories about why we yawn. Here are the three most common theories: \n\n\nThe Physiological Theory -- Our bodies induce yawning to drawn in more oxygen or remove a build-up of carbon dioxide. This theory helps explain why we yawn in groups. Larger groups produce more carbon dioxide, which means our bodies would act to draw in more oxygen and get rid of the excess carbon dioxide. However, if our bodies make us yawn to drawn in needed oxygen, wouldn't we yawn during exercise? Robert Provine, a psychologist at the University of Maryland, Baltimore County, and a leading expert on yawning, has tested this theory. Giving people additional oxygen didn't decrease yawning and decreasing the amount of carbon dioxide in a subject's environment also didn't prevent yawning. \nThe Evolution Theory -- Some think that yawning is something that began with our ancestors, who used yawning to show their teeth and intimidate others. An offshoot of this theory is the idea that yawning developed from early man as a signal for us to change activities. \nThe Boredom Theory -- In the dictionary, yawning is said to be caused by boredom, fatigue or drowsiness. Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete in their event. It's doubtful that they are bored with the world watching them. \nThe simple truth is that even though humans have been yawning for possibly as long as they have existed, we have no clue as to why we do it. Maybe it serves some healthful purpose. It does cause us to draw in more air and our hearts to race faster than normal, but so does exercise. There's still much we don't understand about our own brains, so maybe yawning is triggered by some area of the brain we have yet to discover. We do know that yawning is not limited to man. Cats, dogs, even fish yawn, which leads us back to the idea that yawning is some form of communication. \n\nHave we provoked a yawn out of you yet? If we have, hopefully it's not out of boredom, but by the power of suggestion.
792582
A yawn is in response to too much CO2 in the blood stream.  When you yawn there is a negative feed back loop in operation which tells the diaphram to contract (take a breath) because there is too much CO2......the yawn actually increases CO2.\nThe sneeze is due to irritation in the beginning of the respiratory tract, it expells such things as dust, bacteria and other irritants from your nose and sinuses.\nA hiccup is a sligh malfunction or mistiming if you will of the glottis which is a membrane that closes in your throat to prevent food from going into your lungs when you swallow.  Whenyou ge tthe hiccups it starts to close while you are taking a breath or expelling a breath.  It just takes a bit of time for your body to reset when it closes
922965
THE TRUTH IS that we don’t completely understand why people, or animals for that matter, yawn. It’s widely assumed that yawning occurs because we are tired or bored or because we see someone else doing it, but there isn’t any hard evidence to support these beliefs.\n\nThe most plausible explanation, and the one that is taught in medical school, is that we yawn because oxygen levels in our lungs are low. Studies have shown that during normal, at-rest breathing, we don’t use anywhere near our lung capacity; for the most part, we just use the air sacs at the bottom of the lungs. If the air sacs, called alveoli, don’t get fresh air, they partially collapse and the lungs stiffen a bit. As a result, it’s believed, our brain prompts the body to either sigh or take a yawn to get more air into the lungs\nalso when we someone else yawn if someone else yawns, we are naturally competitive so if someone else is getting more oxygen, our body wants more.
776943
Certainly yes! The sound of burping is caused by the vibration of the esophageal sphincter as the gas passes through it so whatever is the cause of the muteness it is far related to the esophagus. It is just like asking if a mute breathed would they make a sound?☺