high risk ositun a disorder with rope to hearing impairment
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1 .1billion young people ( aged between 12–35 years) are at risk of hearing loss due to exposure to noise in ...
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Around 466 million people worldwide have disabling hearing loss (1), and 34 million of these are children.
It is estimated that by 2050 over 900 million people will have disabling hearing loss.
Hearing loss may result from genetic causes, complications at birth, certain infectious diseases, chronic ear infections, the use of particular drugs, exposure to excessive noise, and ageing.
60% of childhood hearing loss is due to preventable causes.
1.1 billion young people (aged between 12–35 years) are at risk of hearing loss due to exposure to noise in recreational settings.
Unaddressed hearing loss poses an annual global cost of US$ 750 billion. Interventions to prevent, identify and address hearing loss are cost-effective and can bring great benefit to individuals.
People with hearing loss benefit from early identification; use of hearing aids, cochlear implants and other assistive devices; captioning and sign language; and other forms of educational and social support.
Current estimates suggest an 83% gap in hearing aid need and use, i.e., only 17% of those who could benefit from use of a hearing aid actually use one.
Over 5% of the world’s population – or 466 million people – has disabling hearing loss (432 million adults and 34 million children). It is estimated that by 2050 over 900 million people – or one in every ten people – will have disabling hearing loss.
Disabling hearing loss refers to hearing loss greater than 40 decibels (dB) in the better hearing ear in adults and a hearing loss greater than 30 dB in the better hearing ear in children. The majority of people with disabling hearing loss live in low- and middle-income countries.
Approximately one third of people over 65 years of age are affected by disabling hearing loss. The prevalence in this age group is greatest in South Asia, Asia Pacific and sub-Saharan Africa.
Hearing loss and deafness
A person who is not able to hear as well as someone with normal hearing – hearing thresholds of 25 dB or better in both ears – is said to have hearing loss. Hearing loss may be mild, moderate, severe, or profound. It can affect one ear or both ears, and leads to difficulty in hearing conversational speech or loud sounds.
'Hard of hearing' refers to people with hearing loss ranging from mild to severe. People who are hard of hearing usually communicate through spoken language and can benefit from hearing aids, cochlear implants, and other assistive devices as well as captioning. People with more significant hearing losses may benefit from cochlear implants.
'Deaf' people mostly have profound hearing loss, which implies very little or no hearing. They often use sign language for communication.
Causes of hearing loss and deafness
The causes of hearing loss and deafness can be congenital or acquired.
Congenital causes
Congenital causes may lead to hearing loss being present at or acquired soon after birth. Hearing loss can be caused by hereditary and non-hereditary genetic factors or by certain complications during pregnancy and childbirth, including:
maternal rubella, syphilis or certain other infections during pregnancy;
low birth weight;
birth asphyxia (a lack of oxygen at the time of birth);
inappropriate use of particular drugs during pregnancy, such as aminoglycosides, cytotoxic drugs, antimalarial drugs, and diuretics;
severe jaundice in the neonatal period, which can damage the hearing nerve in a newborn infant.
Acquired causes
Acquired causes may lead to hearing loss at any age, such as:
infectious diseases including meningitis, measles and mumps;
chronic ear infections;
collection of fluid in the ear (otitis media);
use of certain medicines, such as those used in the treatment of neonatal infections, malaria, drug-resistant tuberculosis, and cancers;
injury to the head or ear;
excessive noise, including occupational noise such as that from machinery and explosions;
recreational exposure to loud sounds such as that from use of personal audio devices at high volumes and for prolonged periods of time and regular attendance at concerts, nightclubs, bars and sporting events;
ageing, in particular due to degeneration of sensory cells; and
wax or foreign bodies blocking the ear canal.
Among children, chronic otitis media is a common cause of hearing loss.
Impact of hearing loss
Functional impact
One of the main impacts of hearing loss is on the individual’s ability to communicate with others. Spoken language development is often delayed in children with unaddressed hearing loss.
Unaddressed hearing loss and ear diseases such as otitis media can have a significantly adverse effect on the academic performance of children. They often have increased rates of grade failure and greater need for education assistance. Access to suitable accommodations is important for optimal learning experiences but are not always available.