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14.02.2014

Noise induced hearing loss in one ear, tinnitus ireland - .

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NIHL can be caused by a one-time exposure to an intense “impulse” sound, such as an explosion, or by continuous exposure to loud sounds over an extended period of time, such as noise generated in a woodworking shop. Recreational activities that can put you at risk for NIHL include target shooting and hunting, snowmobile riding, listening to MP3 players at high volume through earbuds or headphones, playing in a band, and attending loud concerts. Your distance from the source of the sound and the length of time you are exposed to the sound are also important factors in protecting your hearing.
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum.
The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. The bones in the middle ear couple the sound vibrations from the air to fluid vibrations in the cochlea of the inner ear, which is shaped like a snail and filled with fluid. When you are exposed to loud noise over a long period of time, you may slowly start to lose your hearing. NIHL can also be caused by extremely loud bursts of sound, such as gunshots or explosions, which can rupture the eardrum or damage the bones in the middle ear. Loud noise exposure can also cause tinnitus—a ringing, buzzing, or roaring in the ears or head. Sometimes exposure to impulse or continuous loud noise causes a temporary hearing loss that disappears 16 to 48 hours later.
Wear earplugs or other protective devices when involved in a loud activity (activity-specific earplugs and earmuffs are available at hardware and sporting goods stores). The National Institute on Deafness and Other Communication Disorders (NIDCD) supports research on the causes, diagnosis, treatment, and prevention of hearing loss.
Researchers are also looking at the protective properties of supporting cells in the inner ear, which appear to be capable of lessening the damage to sensory hair cells upon exposure to noise. The NIDCD maintains a directory of organizations that provide information on the normal and disordered processes of hearing, balance, taste, smell, voice, speech, and language. Otosclerosis —An abnormal overgrowth of one or more bones in the middle ear prevents the small bones from moving normally. Drugs — Many prescription and nonprescription medications can damage the ear and cause hearing loss. If you have sudden, severe hearing loss, you will notice immediately that your ability to hear has decreased dramatically or disappeared totally in the affected ear. Wear protective earplugs or earmuffs if you are often exposed to loud noise at work or during recreational activities.
Drug-induced hearing loss — Stopping the problem medication may reverse hearing loss or prevent it from getting worse.
Sudden sensorineural hearing loss — When the cause is unknown, this condition is usually treated with steroids. Hearing Pages is an independent online ecosystem for the hearing care industry including manufacturers, clinics, orgs and consumers.
Exposure to harmful sounds causes damage to the hair cells as well as the auditory, or hearing, nerve (see figure).
Continuous exposure to loud noise also can damage the structure of hair cells, resulting in hearing loss and tinnitus, although the process occurs more gradually than for impulse noise. Scientists believe that, depending on the type of noise, the pure force of vibrations from the noise can cause hearing loss.
When a person is exposed to loud noise over a long period of time, symptoms of NIHL will increase gradually. Wear earplugs or other hearing protective devices when involved in a loud activity (special earplugs and earmuffs are available at hardware and sporting goods stores).


If you suspect hearing loss, have a medical examination by an otolaryngologist (a physician who specializes in diseases of the ears, nose, throat, head, and neck) and a hearing test by an audiologist (a health professional trained to measure and help individuals deal with hearing loss).
Hearing depends on a series of events that change sound waves in the air into electrical signals. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. As the hair cells move up and down, their bristly structures bump up against an overlying membrane and tilt to one side. The National Institute on Deafness and Other Communication Disorders (NIDCD) researches the causes, diagnosis, treatment, and prevention of hearing loss.
NIDCD researchers also are investigating a potential way to prevent NIHL after noise exposure. Harmful noises at home may come from sources including lawnmowers, leaf blowers, and woodworking tools. Sounds of less than 75 decibels, even after long exposure, are unlikely to cause hearing loss. Hearing depends on a series of events that change sound waves in the air into electrical signals.
Because the damage from noise exposure is usually gradual, you might not notice it, or you might ignore the signs of hearing loss until they become more pronounced. Recent research suggests, however, that although the loss of hearing seems to disappear, there may be residual long-term damage to your hearing. If you understand the hazards of noise and how to practice good hearing health, you can protect your hearing for life. NIDCD-supported researchers have helped to identify some of the many genes important for hair-cell development and function and are using this knowledge to explore new treatments for hearing loss.
Protect Their Hearing®, a national public education campaign to increase awareness among parents of preteens about the causes and prevention of NIHL. The most common reversible causes are severe buildup of earwax in the ear canal and acute infections of the external ear or middle ear. A vibrating tuning fork is placed in the middle of your forehead to help diagnose one-sided hearing loss. Your doctor may recommend a hearing aid or an implant to improve your ability to communicate with others.
If a person regains hearing, the temporary hearing loss is called a temporary threshold shift. Recent studies also show that exposure to harmful noise levels triggers the formation of molecules inside the ear that damage hair cells and result in NIHL. All individuals should understand the hazards of noise and how to practice good hearing health in everyday life. Most hearing loss is caused by damaged hair cells, which do not grow back in humans and other mammals. Noise exposure triggers the formation of destructive molecules, called free radicals, which cause hair cell death. Even if you can’t tell that you are damaging your hearing, you could have trouble hearing in the future, such as not being able to understand other people when they talk, especially on the phone or in a noisy room.
Approximately 15 percent of Americans between the ages of 20 and 69—or 26 million Americans—have hearing loss that may have been caused by exposure to noise at work or in leisure activities. However, long or repeated exposure to sounds at or above 85 decibels can cause hearing loss. This partition is called the basilar membrane because it serves as the base, or ground floor, on which key hearing structures sit.


Armed with this information, parents, teachers, school nurses, and other adults can encourage children to adopt healthy hearing habits. Noise-induced hearing loss can happen because of a single brief burst of an extremely loud sound.
Acoustic neuroma often causes dizziness and equilibrium problems in addition to gradual hearing loss. Or it can result from a Q-tip that ruptures the eardrum during an attempt to clean the ear canal. Your doctor will want to know if you have been exposed to loud noises, trauma of the ear or head, or ear infections.
He or she will check for middle-ear problems by measuring your eardrum's ability to reflect sounds.
A hearing aid amplifies sounds electronically and is effective for many people with age-related hearing loss.
The temporary threshold shift largely disappears 16 to 48 hours after exposure to loud noise.
These destructive molecules play an important role in hearing loss in children and adults who listen to loud noise for too long. Someone with NIHL may not even be aware of the loss, but it can be detected with a hearing test. NIDCD-supported researchers have helped to identify some of the many genes important for ear development and hearing; they have also been studying the possibility of using gene therapy to regrow hair cells in mammals. These sounds can damage sensitive structures in the inner ear and cause noise-induced hearing loss (NIHL). Regardless of how it might affect you, one thing is certain: noise-induced hearing loss is something you can prevent.
As many as 16 percent of teens (ages 12 to 19) have reported some hearing loss that could have been caused by loud noise, according to a 2010 report based on a survey from the Centers for Disease Control and Prevention (CDC). The damage from NIHL, combined with aging, can lead to hearing loss severe enough that you need hearing aids to magnify the sounds around you to help you hear, communicate, and participate more fully in daily activities. Your doctor will want to rule out the possibility that medications may be causing your hearing loss.
Hearing aids today are very small, so small that other people often do not notice you are wearing them. Hearing loss and tinnitus may be experienced in one or both ears, and tinnitus may continue constantly or occasionally throughout a lifetime. You can prevent NIHL from both impulse and continuous noise by regularly using hearing protectors such as earplugs or earmuffs. In a recent study, however, the antioxidants in salicylate (aspirin) and Trolox (vitamin E) were given to guinea pigs as long as three days after noise exposure and still significantly reduced hearing loss. It is typically harder to hear high-pitched tones (women's voices, violins) than low-pitched ones (men's voices, bass guitar). These results suggest that there is a window of opportunity in which it is possible to rescue hearing from noise trauma.



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