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29.12.2013

Loud ringing sound in ear, ear pressure problems tinnitus - For You

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Human Senses Pictures Hair cells within the inner ear contain bundles of hair-like extensions that convert sound.
Constant noise in the head -- such as ringing in the ears -- rarely indicates a serious health problem, but it sure can be annoying. Tinnitus (pronounced tih-NITE-us or TIN-ih-tus) is sound in the head with no external source.
Almost everyone has had tinnitus for a short time after being exposed to extremely loud noise. Sound waves travel through the ear canal to the middle and inner ear, where hair cells in part of the cochlea help transform sound waves into electrical signals that then travel to the brain's auditory cortex via the auditory nerve. Most people who seek medical help for tinnitus experience it as subjective, constant sound, and most have some degree of hearing loss. Tinnitus can arise anywhere along the auditory pathway, from the outer ear through the middle and inner ear to the brain's auditory cortex, where it's thought to be encoded (in a sense, imprinted). Musculoskeletal factors — jaw clenching, tooth grinding, prior injury, or muscle tension in the neck — sometimes make tinnitus more noticeable, so your clinician may ask you to tighten muscles or move the jaw or neck in certain ways to see if the sound changes. If you're often exposed to loud noises at work or at home, it's important to reduce the risk of hearing loss (or further hearing loss) by using protectors such as earplugs or earmuff-like or custom-fitted devices.
The most effective approaches are behavioral strategies and sound-generating devices, often used in combination. These conditions can include ear infections, an obstruction of the ear canal (either wax or foreign objects like earwigs), age-related hearing loss, stress, nasal infections, abnormal growth of the ear bones, blood vessel disorders, a wide variety of neurological disorders such as multiple sclerosis or Meniere's disease. The most common cause, though, is prolonged exposure to excessive noice (above 70 dB; think vacuum cleaner and louder) without sufficient hearing protection.
Your inner ear's cochlea is lined with thousands of fine, hair-like cells that vibrate when exposed to sound waves. Quinine and some of the other anti-malarial drugs can occasionally cause damage to the ear when given in high or prolonged doses, such as in the treatment of malaria. For those that already suffer from Tinnitus, there is no FDA-approved medication available to treat it, though treating the underlying cause often relieves the ringing. Tinnitus (pronounced ti-ni-tis), or ringing in the ears, is the sensation of hearing ringing, buzzing, hissing, chirping, whistling, or other sounds. Some instances of tinnitus are caused by infections or blockages in the ear, and the tinnitus can disappear once the underlying cause is treated.
For many, it's a ringing sound, while for others, it's whistling, buzzing, chirping, hissing, humming, roaring, or even shrieking.
When hair cells are damaged — by loud noise or ototoxic drugs, for example — the circuits in the brain don't receive the signals they're expecting.


Things that cause hearing loss (and tinnitus) include loud noise, medications that damage the nerves in the ear (ototoxic drugs), impacted earwax, middle ear problems (such as infections and vascular tumors), and aging.
She or he will take a medical history, give you a physical examination, and do a series of tests to try to find the source of the problem. Pulsatile tinnitus calls for a thorough evaluation by an otolaryngologist (commonly called an ear, nose, and throat specialist, or ENT) or neurotologist, especially if the noise is frequent or constant. Other treatments that have been studied for tinnitus include transcutaneous electrical stimulation of parts of the inner ear by way of electrodes placed on the skin or acupuncture needles, and stimulation of the brain using a powerful magnetic field (a technique called repetitive transcranial magnetic stimulation, or rTMS).
In fact, some people with tinnitus experience no difficulty hearing, and in a few cases they even become so acutely sensitive to sound (hyperacusis) that they must take steps to muffle or mask external noises.
But ringing in the ears that does not get better or go away is an ear condition called tinnitus. The noises around you were muffled briefly, replaced with a buzzing inside your head, almost as if your ears were screaming. For example, if you have a heart murmur, you may hear a whooshing sound with every heartbeat; your clinician can also hear that sound through a stethoscope. This stimulates abnormal activity in the neurons, which results in the illusion of sound, or tinnitus.
Tinnitus can also be a symptom of Mnire's disease, a disorder of the balance mechanism in the inner ear. Our bodies normally produce sounds (called somatic sounds) that we usually don't notice because we are listening to external sounds.
She or he will also ask you to describe the noise you're hearing (including its pitch and sound quality, and whether it's constant or periodic, steady or pulsatile) and the times and places in which you hear it. If you have age-related hearing loss, a hearing aid can often make tinnitus less noticeable by amplifying outside sounds.
This neural loop normally allows us to pick up very faint and distant sounds by detecting subtle changes in the vibrations of various hairs.
In such a case, other therapies -- both conventional and alternative -- may bring significant relief by either decreasing or covering up the unwanted sound. The noise causes permanent damage to the sound-sensitive cells of the cochlea, a spiral-shaped organ in the inner ear. In a way, they were.­Noise levels louder than a shouting match can damage parts of our inner ears called hair cells.
The main components of TRT are individual counseling (to explain the auditory system, how tinnitus develops, and how TRT can help) and sound therapy. But when these hairs are damaged or killed by repeated loud noise exposure, the underlying neurons remain active, sending a false signal to the brain that there is incoming sound when there really isn't.


Carpenters, pilots, rock musicians, street-repair workers, and landscapers are among those whose jobs put them at risk, as are people who work with chain saws, guns, or other loud devices or who repeatedly listen to loud music. The sound may keep time with your heartbeat, it may keep pace with your breathing, it may be constant, or it may come and go. Pulsatile tinnitus may be more noticeable at night, when you're lying in bed, because more blood is reaching your head, and there are fewer external sounds to mask the tinnitus. The resulting electrical noise takes the form of tinnitus — a sound that is high-pitched if hearing loss is in the high-frequency range and low-pitched if it's in the low-frequency range. A 2010 review of six studies by the Cochrane Collaboration (an international group of health authorities who evaluate randomized trials) found that after CBT, the sound was no less loud, but it was significantly less bothersome, and patients' quality of life improved.
A device is inserted in the ear to generate low-level noise and environmental sounds that match the pitch, volume, and quality of the patient's tinnitus. The most common cause of tinnitus is hearing loss that occurs with aging, but it can also be caused by living or working around loud noises. When sound waves hit them, they convert those vibrations into electrical currents that our auditory nerves carry to the brain.
Without hair cells, there is nothing for the sound to bounce off, like trying to make your voice echo in the desert.Hair cells reside in the inner ear inside the shell-shaped cochlea.
When sound waves travel through the ears and reach the hair cells, the vibrations deflect off the stereocilia, causing them to move according to the force and pitch of the vibration. Hearing loss treatments depend on the cause and include hearing aids, sound-amplifying devices, and antibiotics if the cause is an infection.
This motion triggers an electrochemical current that sends the information from the sound waves through the auditory nerves to the brain.­When you hear exceptionally loud noises, your stereocilia become damaged and mistakenly keep sending sound information to the auditory nerve cells. There are a variety of causes of hearing loss besides congenital hearing loss, including ear infections, genetic disorders, illnesses that trigger hearing loss, head injuries, medications, and more.
In the case of rock concerts and fireworks displays, the ringing happens because the tips of some of your stereocilia actually have broken off.
Some children may develop hearing loss because of listening to loud music or other loud noises.



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