Hearing loss due to high noise,high frequency noise in the ear 05,extreme ear pain with sinus infection - Review

31.07.2015
Data from studies in middle- and high-income countries analysed by WHO indicate that among teenagers and young adults aged 12-35 years, nearly 50% are exposed to unsafe levels of sound from the use of personal audio devices and around 40% are exposed to potentially damaging levels of sound at entertainment venues. Safe listening depends on the intensity or loudness of sound, and the duration and frequency of listening. WHO recommends that the highest permissible level of noise exposure in the workplace is 85 dB up to a maximum of eight hours per day.
Governments also have a role to play by developing and enforcing strict legislation on recreational noise, and by raising awareness of the risks of hearing loss through public information campaigns. To mark International Ear Care Day, celebrated each year on March 3rd, WHO is launching the “Make Listening Safe” initiative to draw attention to the dangers of unsafe listening and promote safer practices.
Worldwide, 360 million people today have moderate to profound hearing loss due to various causes, such as noise, genetic conditions, complications at birth, certain infectious diseases, chronic ear infections, the use of particular drugs, and ageing.
In general, ARHL is caused by changes in the inner ear as we age, but genetics, noise exposure, certain medications, smoking, and chronic diseases such as diabetes, kidney disease, and cardiovascular disease can contribute to the progression of ARHL. Tiny hair cells lining the cochlea (a sensory organ inside the inner ear) pick up sound waves and transform them into nerve signals that the brain interprets as sound.
The following figure shows the path sound waves travel through the ear drum to the Cochlea, where the hair cells live, work, and play.
The next figure illustrates the relationship between the hair cells lining the Cochlea and sound frequency detection. This particular research examined hair cell degeneration in mice with different gene structures, leading to different hearing loss results as the mice aged. Untreated hearing loss can lead to or enhance the effects of serious cognitive disorders and emotional conditions such as dementia, Alzheimer’s disease, and depression, according to a recent study from the National Institute of Aging. Another recent study ( Hearing Loss and Incident Dementia) by the Johns Hopkins School of medicine found a strong link between untreated hearing loss and the development of dementia.


Untreated hearing loss also leads to serious negative lifestyle changes, which often effect family, friends, and others. Mounting evidence of serious consequences resulting from untreated hearing loss underscore why hearing loss should not be considered merely an annoying part of aging, but an important issue for public health. ARHL is progressive and permanent …but you CAN improve your communication …and your quality of life!
Simply put, the louder the sound, the shorter the time before damage occurs… there are no treatments…not medicine, not surgery, not hearing aids…that can restore your hearing once it is damaged by noise. Under the theme “Make Listening Safe”, WHO draws attention to the rising problem of noise-induced hearing loss due to recreational exposure to loud sounds. Unsafe levels of sounds can be, for example, exposure to in excess of 85 decibels (dB) for eight hours or 100 dB for 15 minutes. Exposure to loud sounds can result in temporary hearing loss or tinnitus which is a ringing sensation in the ear. Many patrons of nightclubs, bars and sporting events are often exposed to even higher levels of sound, and should therefore considerably reduce the duration of exposure. They can also limit the time spent engaged in noisy activities by taking short listening breaks and restricting the daily use of personal audio devices to less than one hour.
Parents, teachers and physicians can educate young people about safe listening, while managers of entertainment venues can respect the safe noise levels set by their respective venues, use sound limiters, and offer earplugs and “chill out” rooms to patrons. In collaboration with partners worldwide, WHO will alert young people and their families about the risks of noiseinduced hearing loss and advocate towards governments for greater attention to this issue as part of their broader efforts to prevent hearing loss generally. The hair cells lining the cochlea have varying sensitivity for detecting sounds of different frequencies. A scanning electron microscope reveals hair cell damage (hair cells bent over and damaged) due to aging.


The risk for these disorders increases with increasing levels of hearing loss; for every 10 decibels of hearing loss, the chance of developing severe cognitive disorders increases by 20 percent. A study by Johns Hopkins experts, found that older adults with hearing loss are more likely than peers with normal hearing to require hospitalization and suffer from periods of inactivity and depression. Approximately one third of Americans between 65 and 74 and nearly half of those over 75 have hearing and communication problems. To enhance your browsing experience, please upgrade to a more current browser such as Firefox, Safari or update to Internet Explorer 9. When the exposure is particularly loud, regular or prolonged, it can lead to permanent damage of the ear’s sensory cells, resulting in irreversible hearing loss.
For example, exposure to noise levels of 100 dB, which is typical in such venues, is safe for no more than 15 minutes. Manufacturers can design personal audio devices with safety features and display information about safe listening on products and packaging. These and other studies indicate that hearing deficits can lead to social isolation, resulting in physical and mental declines.
In addition they should heed the warning signs of hearing loss and get regular hearing checkups.
Middle frequencies are detected by hair cells at the center of the winding Cochlea, and hair cells at the apex of the Cochlea detect lower tones. ARHL usually begins with high frequency hearing loss (degeneration of the hair cells lining the bottom of the Cochlea) and later affects the lower frequencies at the apex of the Cochlea.



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Comments Hearing loss due to high noise

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  2. Spiderman_007
    Compounds that can lead to either tinnitus.