Hello when I stand after sitting and driving I fell like unstedy I can’t hear properly like sounds getting high and low each seconds …after 2 or 3 minutes only I came back normal hearing sounds…I have this problem from last 2 years …on starting stage I got ear infection and undergo nose operation they removed my inside nose tissues still i have this problem what can i do..
Prelingual deafness is profound hearing loss that is sustained before the acquisition of language, which can occur due to a congenital condition or through hearing loss before birth or in early infancy. Prelingual deafness impairs an individual's ability to acquire a spoken language in children, but deaf children can acquire spoken language through support from cochlear implants (sometimes combined with hearing aids).[42][43] Non-signing (hearing) parents of deaf babies (90-95% of cases) usually go with oral approach without the support of sign language, as these families lack previous experience with sign language and cannot competently provide it to their children without learning it themselves. Unfortunately, this may in some cases (late implantation or not sufficient benefit from cochlear implants) bring the risk of language deprivation for the deaf baby[44] because the deaf baby wouldn't have a sign language if the child is unable to acquire spoken language successfully. The 5-10% of cases of deaf babies born into signing families have the potential of age-appropriate development of language due to early exposure to a sign language by sign-competent parents, thus they have the potential to meet language milestones, in sign language in lieu of spoken language.[45]
There can be damage either to the ear, whether the external or middle ear, to the cochlea, or to the brain centers that process the aural information conveyed by the ears. Damage to the middle ear may include fracture and discontinuity of the ossicular chain. Damage to the inner ear (cochlea) may be caused by temporal bone fracture. People who sustain head injury are especially vulnerable to hearing loss or tinnitus, either temporary or permanent.[73][74]
Tinnitus is sometimes called ‘the sound of silence' because most people, if they are seated in a completely quiet soundproofed room, will hear a type of rushing or hissing sound. Usually this sound is masked by everyday environmental noise. It is when this noise becomes intrusive that it can become irritating and is known as ‘tinnitus'. The more anxious the sufferer gets the worse the tinnitus becomes.
If your hearing loss is caused by a build-up of earwax, it will need to be removed. You may be able to have this done at your surgery by syringing. Warm water is flushed into your ear canal to remove the wax. But first the wax has to be softened by applying olive oil or almond oil drops, or drops containing sodium bicarbonate, for several days beforehand. You can buy these drops from your local pharmacy. In some cases, you may have to go to a specialist clinic to have wax removed by syringing or with microsuction.
If you are referred to a specialist tinnitus clinic, and your tinnitus is particularly troublesome, you will be introduced to more formal or structured ways of managing tinnitus. Most centres use a combination of approaches. You may come across some terms before, or hear them when you get there, and it helps to have some understanding of what these terms are.

Atherosclerosis. With age and buildup of cholesterol and other deposits, major blood vessels close to your middle and inner ear lose some of their elasticity — the ability to flex or expand slightly with each heartbeat. That causes blood flow to become more forceful, making it easier for your ear to detect the beats. You can generally hear this type of tinnitus in both ears.
Tinnitus is the term for the sensation of hearing a sound in the absence of any external sound. Symptoms of tinnitus are you may hear different types of sound, for example, ringing, whooshing or humming or buzzing in the ear. These can be continuous or they can come and go. The tinnitus might seem like it’s in one ear or both, in the middle of the head or even be difficult to pinpoint. Some people may think the noise is coming from outside and hunt for it until they discover it’s actually inside them!

The best supported treatment for tinnitus is a type of counseling called cognitive behavioral therapy (CBT) which can be delivered via the internet or in person.[5][68][82] It decreases the amount of stress those with tinnitus feel.[83] These benefits appear to be independent of any effect on depression or anxiety in an individual.[82] Acceptance and commitment therapy (ACT) also shows promise in the treatment of tinnitus.[84] Relaxation techniques may also be useful.[3] A clinical protocol called Progressive Tinnitus Management for treatment of tinnitus has been developed by the United States Department of Veterans Affairs.[85]
The International Organization for Standardization (ISO) developed the ISO 1999 standards for the estimation of hearing thresholds and noise-induced hearing impairment.[104] They used data from two noise and hearing study databases, one presented by Burns and Robinson (Hearing and Noise in Industry, Her Majesty's Stationery Office, London, 1970) and by Passchier-Vermeer (1968).[105] As race are some of the factors that can affect the expected distribution of pure-tone hearing thresholds several other national or regional datasets exist, from Sweden,[106] Norway,[107] South Korea,[108] the United States[109] and Spain.[110]

Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children.[2] Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.[2] Blocking of the eustachian tube leads to decreased pressure in the middle ear relative to the external ear, and this causes decreased motion of both the ossicles and the tympanic membrane.[3]

The accepted definition of chronic tinnitus, as compared to normal ear noise experience, is five minutes of ear noise occurring at least twice a week.[51] However, people with chronic tinnitus often experience the noise more frequently than this and can experience it continuously or regularly, such as during the night when there is less environmental noise to mask the sound.
Typically, people describe acoustic shock as feeling like they have been stabbed or electrocuted in the ear. The symptoms are involuntary, unpleasant and frightening; they can range from mild to severe; and be of short, temporary duration or persistent. If symptoms persist, a range of emotional reactions including trauma, anxiety and depression can develop.
If you develop hearing loss due to a buildup of wax in the ear canal, you can remove the wax at home. Over-the-counter solutions, including wax softeners, can remove wax from the ear. Syringes can also push warm water through the ear canal to remove the wax. Consult your doctor before attempting to remove any object stuck in your ear to avoid unintentionally damaging your ear.
Having information about tinnitus can be very helpful. A lot of people start off looking online and while there is some fantastic information available on the internet, there is also a lot of very unhelpful information. An easy way to ensure what you are reading is appropriately written and produced is to check that the Information Standard has been adhered to - all our information complies with the Information Standard.
Tinnitus may be classified in two types: subjective tinnitus and objective tinnitus.[3] Tinnitus is usually subjective, meaning that the sounds the person hears are not detectable by means currently available to physicians and hearing technicians.[3] Subjective tinnitus has also been called "tinnitus aurium", "non-auditory" or "non-vibratory" tinnitus. In rare cases, tinnitus can be heard by someone else using a stethoscope. Even more rarely, in some cases it can be measured as a spontaneous otoacoustic emission (SOAE) in the ear canal. This is classified as objective tinnitus,[3] also called "pseudo-tinnitus" or "vibratory" tinnitus.
ASD is beginning to be recognised as a legitimate and discreet disorder, and can be readily misdiagnosed as TMD stemming from TMJ dysfunction. From a differential diagnosis perspective, TMJ dysfunction can lead to TTTS symptoms and escalate to TMD. While central pain sensitisation is common with TMD caused by TMJ dysfunction, the aural symptoms do not tend to escalate and hyperacusis is not usually present.
^ Global Burden of Disease Study 2013 Collaborators (August 2015). "Global, regional, and national incidence, prevalence, and years lived with disability for 301 acute and chronic diseases and injuries in 188 countries, 1990-2013: a systematic analysis for the Global Burden of Disease Study 2013". Lancet. 386 (9995): 743–800. doi:10.1016/s0140-6736(15)60692-4. PMC 4561509. PMID 26063472.
I was a few feet away from a coworker when she reported a very painful blast of sound through her headset recently. She was crying and shakey, and the ear I could see, as well as a couple inches of the skin surrounding the ear, were very reddened. This was a few minutes post injury and she said it still hurt very much. Both our Human Resources Department and Information Technology seemed to have no idea what had happened to cause the injury. How could they not know abt. acoustic shock injury by now? Since a couple years after starting working at my call center, I have had ridiculously hypersensitive hearing. Everything in my environment seems too loud and I’m also ridiculously irritable most of the time, but especially when there’s any noise in my environment like small children make, or traffic. It’s like my nervous system is all revved up most of the time for no particular reason. Now I know why.
Hyperacusis escalation is common with ASD so that an increasing range of sounds become intolerable, with a corresponding escalation in TTTS symptoms, potentially leading to TMD. For this reason, a detailed history is essential in tracking the order of development and escalation of symptoms, and their relationship to acoustic incidents/headset use, prior to making a responsible and considered diagnosis of ASD.
^ Jump up to: a b Loughrey DG, Kelly ME, Kelley GA, Brennan S, Lawlor BA (February 2018). "Association of Age-Related Hearing Loss With Cognitive Function, Cognitive Impairment, and Dementia: A Systematic Review and Meta-analysis". JAMA Otolaryngology-- Head & Neck Surgery. 144 (2): 115–126. doi:10.1001/jamaoto.2017.2513. PMC 5824986. PMID 29222544.

An exaggerated startle reflex and hypervigilance are listed as symptoms of PTSD (DSM-IV, D.5), and individuals with PTSD have been shown to produce heightened autonomic responses (eg increased heart rate) to acoustic stimuli that would not be expected to produce a startle response. My clinical observation of over 85 ASD clients shows that once TTTS has become established, auditory hypervigilance and an exaggerated startle reflex can lead to the escalation of hyperacusis, where the range of sounds that elicit this involuntary response increases to include more everyday sounds. These sounds become increasingly intolerable when TTTS symptoms are exacerbated following exposure. Phonophobia, headache, fatigue, anxiety, and depression can result, particularly if an inadequate explanation or diagnosis of TTTS symptoms is not offered.
Call centre staff using a telephone headset are vulnerable to ASD because of the increased likelihood of exposure, close to their ear(s), of sudden unexpected loud sounds randomly transmitted via the telephone line. In the early 1990s, co-inciding with the rapid growth of call centres in Australia, increasing numbers of employees were reporting ASD symptoms. A similar pattern was being noticed overseas. As a result, a number of audiologists, scientists and occupational health experts began to research ASD.

I have had cricket sounds (pulsing noise) in my tinnitus condition for the last 2 months. Supplements help, if the condition includes dizziness. I recommend LipoFlavinoids (or Citrus Flavinoids from other brands like Now), Gingko Bilboa, Tumeric Circumin. As I also have have mild tension headaches I use also B12 - 1000 mcg, B100 complex, Cherry (Bing) extract, B2 - 100mg. If you do not have headaches, I recommend the B100 complex.
Ramirez et al (14) aimed to explore the anatomical and physiological connections in TMD patients with secondary aural symptoms and the central and peripheral mechanisms involved. The authors carried out an extensive peer-reviewed literature search, using data from (12), 436 patients in 49 papers, to analyse aural symptoms (otalgia, tinnitus, vertigo, subjective hearing loss and aural fullness) exacerbated by dysfunctional mouth and jaw dynamics. They proposed a range of muscular, bone communication and neural scenarios to explain this relationship, placing emphasis on tensor tympani muscle involvement and trigeminal nerve dysfunction.
Hearing (audiological) exam. As part of the test, you'll sit in a soundproof room wearing earphones through which will be played specific sounds into one ear at a time. You'll indicate when you can hear the sound, and your results are compared with results considered normal for your age. This can help rule out or identify possible causes of tinnitus.
Tinnitus retraining therapy is a form of treatment that tries to retrain the nerve pathways associated with hearing that may allow the brain to get used to the abnormal sounds. Habituation allows the brain to ignore the tinnitus noise signal, and it allows the person to become unaware that it is present unless they specifically concentrate on the noise. This treatment involves counseling and wearing a sound generator. Audiologists and otolaryngologists often work together in offering this treatment.
Most people find that their tinnitus does seem to settle down after this initial period, even without doing anything in particular. You might hear this being referred to as habituation. It’s a bit like walking into a room with a noisy fan or air conditioner. Initially, it seems really loud and then after a while, you stop noticing it as much. Tinnitus can often be much the same – initially, it’s more noticeable but you gradually notice it less than you did. The first time you realise it’s in the background is a great moment – it confirms that there are times when it’s less noticeable, which means you should be able to keep doing the things that you enjoy doing.

^ Jump up to: a b Loughrey DG, Kelly ME, Kelley GA, Brennan S, Lawlor BA (February 2018). "Association of Age-Related Hearing Loss With Cognitive Function, Cognitive Impairment, and Dementia: A Systematic Review and Meta-analysis". JAMA Otolaryngology-- Head & Neck Surgery. 144 (2): 115–126. doi:10.1001/jamaoto.2017.2513. PMC 5824986. PMID 29222544.

^ Jump up to: a b c Han BI, Lee HW, Kim TY, Lim JS, Shin KS (March 2009). "Tinnitus: characteristics, causes, mechanisms, and treatments". Journal of Clinical Neurology. 5 (1): 11–19. doi:10.3988/jcn.2009.5.1.11. PMC 2686891. PMID 19513328. About 75% of new cases are related to emotional stress as the trigger factor rather than to precipitants involving cochlear lesions.
If your child has not been born with hearing problems, it is most likely that their hearing loss is temporary. However, some children are born deaf. Each year in the UK, around 840 babies are born with permanent hearing loss. Your child will have a hearing test soon after they’re born (the Newborn Hearing Screening Programme ), so any problems with their hearing can be picked up early on.

Other potential sources of the sounds normally associated with tinnitus should be ruled out. For instance, two recognized sources of high-pitched sounds might be electromagnetic fields common in modern wiring and various sound signal transmissions. A common and often misdiagnosed condition that mimics tinnitus is radio frequency (RF) hearing, in which subjects have been tested and found to hear high-pitched transmission frequencies that sound similar to tinnitus.[72][73]

Conductive hearing loss occurs when sounds aren’t able to travel from the outer ear to the eardrum and the bones of the middle ear. When this type of hearing loss occurs, you may find it difficult to hear soft or muffled sounds. Conductive hearing loss isn’t always permanent. Medical interventions can treat it. Treatment may include antibiotics or surgical interventions, such as a cochlear implant. A cochlear implant is a small electrical machine placed under your skin behind the ear. It translates sound vibrations into electrical signals that your brain can then interpret as meaningful sound.
In addition to medications, hearing loss can also result from specific chemicals in the environment: metals, such as lead; solvents, such as toluene (found in crude oil, gasoline[67] and automobile exhaust,[67] for example); and asphyxiants.[68] Combined with noise, these ototoxic chemicals have an additive effect on a person's hearing loss.[68] Hearing loss due to chemicals starts in the high frequency range and is irreversible. It damages the cochlea with lesions and degrades central portions of the auditory system.[68] For some ototoxic chemical exposures, particularly styrene,[69] the risk of hearing loss can be higher than being exposed to noise alone. The effects is greatest when the combined exposure include impulse noise.[70][71] A 2018 informational bulletin by the US Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) introduces the issue, provides examples of ototoxic chemicals, lists the industries and occupations at risk and provides prevention information.[72]
Tinnitus is the term for the sensation of hearing a sound in the absence of any external sound. Symptoms of tinnitus are you may hear different types of sound, for example, ringing, whooshing or humming or buzzing in the ear. These can be continuous or they can come and go. The tinnitus might seem like it’s in one ear or both, in the middle of the head or even be difficult to pinpoint. Some people may think the noise is coming from outside and hunt for it until they discover it’s actually inside them!
^ McCombe A, Baguley D, Coles R, McKenna L, McKinney C, Windle-Taylor P (2001). "Guidelines for the grading of tinnitus severity: the results of a working group commissioned by the British Association of Otolaryngologists, Head and Neck Surgeons, 1999". Clinical Otolaryngology and Allied Sciences. 26 (5): 388–93. doi:10.1046/j.1365-2273.2001.00490.x. PMID 11678946. Archived (PDF) from the original on 2017-09-24.

▶ If inner ear disorders is due to an infection, then medications are prescribed to control or manage the symptoms of the infection. In case the infection is due to a bacterial infection, antibiotics are prescribed to clear it up. For people who are suffering from vertigo due to inner ear disorders, vestibular therapy is often recommended, and is highly effective.


Consider education and motivation. Set up training sessions for EU Noise Directive and Acoustic Shocks safety needs – something that can be done by bringing the appropriate and independent expertise from the Health and Safety Executive (HSE) or the Acoustic Safety Programme. Remember: educational methods and materials should be tailored to the specific audience. The goal of education and training is not just to inform, but also to motivate. Dynamic, relevant training will imbue workers with a sense of personal control over their hearing health, lead to the development of intrinsic motivation to adopt positive hearing health.
These symptoms often happen all at the same time and last anything from minutes to hours. It is a very distressing condition because it is so unpredictable. Furthermore, it can take a day or two for the symptoms to completely disappear and sufferers often feel drained after an attack. Additionally, although the condition usually starts in one ear, it can spread to both over time.
I wanted to become a surgeon from a very young age and eventually chose ENT surgery for various reasons. Firstly, I had a great mentor when I was a student who was an ENT surgeon. He engaged with me and encouraged me to do research with him which was eventually published. Secondly, ENT surgery is one of only a handful of surgical specialties who see and treat patients of all ages from very small babies to the elderly so the work is very varied.
Call centre staff using a telephone headset are vulnerable to ASD because of the increased likelihood of exposure, close to their ear(s), to an acoustic incident randomly transmitted via the telephone line. In the early 1990s, co-inciding with the rapid growth of call centres in Australia, increasing numbers of employees were reporting acoustic shock symptoms (2). A similar pattern was being noticed overseas (3, 4).

Fetal alcohol spectrum disorders are reported to cause hearing loss in up to 64% of infants born to alcoholic mothers, from the ototoxic effect on the developing fetus plus malnutrition during pregnancy from the excess alcohol intake. Premature birth can be associated with sensorineural hearing loss because of an increased risk of hypoxia, hyperbilirubinaemia, ototoxic medication and infection as well as noise exposure in the neonatal units. Also, hearing loss in premature babies is often discovered far later than a similar hearing loss would be in a full-term baby because normally babies are given a hearing test within 48 hours of birth, but doctors must wait until the premature baby is medically stable before testing hearing, which can be months after birth. [56]The risk of hearing loss is greatest for those weighing less than 1500 g at birth.
Hearing loss has been shown to negatively impact people’s quality of life and their mental state. If you develop hearing loss, you may have difficulty understanding others. This can increase your anxiety level or cause depression. Treatment for hearing loss may improve your life significantly. It may restore self-confidence while also improving your ability to communicate with other people.
Hearing loss is categorized by severity, type, and configuration. Furthermore, a hearing loss may exist in only one ear (unilateral) or in both ears (bilateral). Hearing loss can be temporary or permanent, sudden or progressive. The severity of a hearing loss is ranked according to ranges of nominal thresholds in which a sound must be so it can be detected by an individual. It is measured in decibels of hearing loss, or dB HL. There are three main types of hearing loss: conductive hearing loss, sensorineural hearing loss, and mixed hearing loss.[15] An additional problem which is increasingly recognised is auditory processing disorder which is not a hearing loss as such but a difficulty perceiving sound. The shape of an audiogram shows the relative configuration of the hearing loss, such as a Carhart notch for otosclerosis, 'noise' notch for noise-induced damage, high frequency rolloff for presbycusis, or a flat audiogram for conductive hearing loss. In conjunction with speech audiometry, it may indicate central auditory processing disorder, or the presence of a schwannoma or other tumor.
Hyperactivity and deep brain stimulation. Researchers have observed hyperactivity in neural networks after exposing the ear to intense noise. Understanding specifically where in the brain this hyperactivity begins and how it spreads to other areas could lead to treatments that use deep brain stimulation to calm the neural networks and reduce tinnitus.
Try the skull-thumping trick. If you're coming home from a concert or a club, and your ears won't stop ringing, it's because you've damaged some of the little hairs in your cochlea, which causes inflammation and stimulation of nerves. Your brain interprets this inflammation as constant ringing or buzzing, and this trick can help make that annoying sound go away.

Look into biofeedback therapy for your tinnitus. If you are depressed, stressed, or fatigued, then you may be more susceptible to normal head sounds. Look into biofeedback therapy from a counselor who can help you to tune into the feelings and situations that cause or worsen your tinnitus. This may help you to stop tinnitus when it starts and prevent it from coming back.[2]
Is conductive hearing loss curable? Yes, often. Most cases of conductive hearing loss are temporary and are cured by means of appropriate medical treatment, so it is important to seek immediate medical assistance. Other types of conductive hearing losses can be treated with hearing aids or types of hearing implants. Finally, some types of conductive hearing loss can be treated through surgery.

Since most persons with tinnitus also have hearing loss, a pure tone hearing test resulting in an audiogram may help diagnose a cause, though some persons with tinnitus do not have hearing loss. An audiogram may also facilitate fitting of a hearing aid in those cases where hearing loss is significant. The pitch of tinnitus is often in the range of the hearing loss.
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There is a strong relationship between hearing loss and tinnitus. Any ear problem but particularly hearing loss can 'unmask' the perception of tinnitus, but some patients with tinnitus have no hearing loss. Correction of hearing loss with hearing aids is known to have a beneficial effect upon tinnitus, but sometimes simple reassurance alone is sufficient.
If your hearing loss is caused by a build-up of earwax, it will need to be removed. You may be able to have this done at your surgery by syringing. Warm water is flushed into your ear canal to remove the wax. But first the wax has to be softened by applying olive oil or almond oil drops, or drops containing sodium bicarbonate, for several days beforehand. You can buy these drops from your local pharmacy. In some cases, you may have to go to a specialist clinic to have wax removed by syringing or with microsuction.
Tinnitus is extremely common. Nearly everyone has experienced tinnitus (for example after noisy events or in very quiet environments) 10 per cent of the population experience tinnitus on a regular basis. In about 1-2 per cent of people tinnitus is sufficient to cause distress. However we know that putting anyone in a sufficiently quiet environment will allow them to perceive tinnitus.
Since most persons with tinnitus also have hearing loss, a pure tone hearing test resulting in an audiogram may help diagnose a cause, though some persons with tinnitus do not have hearing loss. An audiogram may also facilitate fitting of a hearing aid in those cases where hearing loss is significant. The pitch of tinnitus is often in the range of the hearing loss.
Hearing loss in both ears can be either conductive, sensorineural, or a mixture of both. It’s best to see an audiologist whenever you think there is a noticeable change in both your ears. They’ll fully assess your ears and perform a number of tests to determine the type of hearing loss you may have, and they’ll be able to recommend the best treatment option to help.

Post-lingual deafness is hearing loss that is sustained after the acquisition of language, which can occur due to disease, trauma, or as a side-effect of a medicine. Typically, hearing loss is gradual and often detected by family and friends of affected individuals long before the patients themselves will acknowledge the disability.[41] Post-lingual deafness is far more common than pre-lingual deafness. Those who lose their hearing later in life, such as in late adolescence or adulthood, face their own challenges, living with the adaptations that allow them to live independently.
ASD is beginning to be recognised as a legitimate and discreet disorder, and can be readily misdiagnosed as TMD stemming from TMJ dysfunction. From a differential diagnosis perspective, TMJ dysfunction can lead to TTTS symptoms and escalate to TMD. While central pain sensitisation is common with TMD caused by TMJ dysfunction, the aural symptoms do not tend to escalate and hyperacusis is not usually present.
Plagued by an unidentified ringing, buzzing, whooshing or other mysterious noise in your ears? It sounds like you may be suffering from tinnitus. Tinnitus is the name for hearing noises that are not caused by an outside source and while it can be extremely frustrating, the good news is it's extremely rare that tinnitus is related to anything more serious.
The initial physiological symptoms of acoustic shock are considered to be a direct consequence of excessive, involuntary middle ear muscle contractions. While the stapedial reflex is an acoustic reflex triggered by high volume levels, the tensor tympani reflex is a startle reflex (6, 7) which is exaggerated by high stress levels. The tensor tympani muscle contracts immediately preceding the sounds produced during self-vocalisation, suggesting it has an established protective function to loud sounds (1), assists in the discrimination of low frequency sounds (8), and is involved in velopharyngeal movements (8).
The research carried out by Ramirez et al (14) shows the aural symptoms associated with TMD and their neurophysiological consequences are at least partially a consequence of TTTS. These aural symptoms and the typical pattern with TMD of chronic, severe myofascial pain; numbness, tingling and burning in and around the ear; escalation and trigger point development in the neck, shoulder and arm and central pain sensitisation are identical to those observed in my clients with severe ASD, and support the proposal that TTTS is the neurophysiological mechanism of ASD. However, ASD clients do not generally have temporomandibular joint (TMJ) dysfunction, unless it is part of a secondary escalation pattern. A hypothesis is presented that TMD can develop when TTTS is caused by an ASD, albeit with a different aetiologic pathway and without TMJ dysfunction.
^ Jump up to: a b Loughrey DG, Kelly ME, Kelley GA, Brennan S, Lawlor BA (February 2018). "Association of Age-Related Hearing Loss With Cognitive Function, Cognitive Impairment, and Dementia: A Systematic Review and Meta-analysis". JAMA Otolaryngology-- Head & Neck Surgery. 144 (2): 115–126. doi:10.1001/jamaoto.2017.2513. PMC 5824986. PMID 29222544.
In addition to medications, hearing loss can also result from specific chemicals in the environment: metals, such as lead; solvents, such as toluene (found in crude oil, gasoline[67] and automobile exhaust,[67] for example); and asphyxiants.[68] Combined with noise, these ototoxic chemicals have an additive effect on a person's hearing loss.[68] Hearing loss due to chemicals starts in the high frequency range and is irreversible. It damages the cochlea with lesions and degrades central portions of the auditory system.[68] For some ototoxic chemical exposures, particularly styrene,[69] the risk of hearing loss can be higher than being exposed to noise alone. The effects is greatest when the combined exposure include impulse noise.[70][71] A 2018 informational bulletin by the US Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) introduces the issue, provides examples of ototoxic chemicals, lists the industries and occupations at risk and provides prevention information.[72]
Prevention involves avoiding exposure to loud noise for longer periods or chronically.[2] If there is an underlying cause, treating it may lead to improvements.[3] Otherwise, typically, management involves psychoeducation or counseling as talk therapy.[5] Sound generators or hearing aids may help some.[2] As of 2013, there were no effective medications.[3] It is common, affecting about 10–15% of people.[5] Most, however, tolerate it well, and it is a significant problem in only 1–2% of people.[5] The word tinnitus comes from the Latin tinnire which means "to ring".[3]
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