Disease In Focus: Hearing loss
Hearing loss that occurs gradually as you age (presbycusis) is common.
REMEDY:Hearing Problems? You Are Not Too Far The Cure
Doctors believe that heredity and chronic exposure to loud noises are the main factors that contribute to hearing loss over time. Other factors, such as
excessive earwax, can temporarily prevent your ears from conducting sounds as well as they should.You can't
reverse hearing loss. However, you don't have to live in a world of muted, less
distinct sounds. You and your doctor or hearing specialist can take steps to
improve what you hear.
SYMPTOMS
Signs and
symptoms of hearing loss may include:
- Muffling of speech and other sounds
- Difficulty understanding words, especially
against background noise or in a crowd of people
- Trouble hearing consonants
- Frequently asking others to speak more slowly,
clearly and loudly
- Needing to turn up the volume of the television
or radio
- Withdrawal from conversations
- Avoidance of some social settings
CAUSES
Some
causes of hearing loss include damage to the inner ear, a buildup of earwax,
infections and a ruptured eardrum. To understand how hearing loss occurs, it can
be helpful to understand how you hear.
How you hear
Hearing
occurs when sound waves reach the structures inside your ear, where the sound
wave vibrations are converted into nerve signals that your brain recognizes as
sound.
Your ear consists of three major
areas: outer ear, middle ear and inner ear.
Sound waves pass through the outer ear and cause vibrations at the eardrum. The
eardrum and three small bones of the middle ear — the hammer, anvil and stirrup
— amplify the vibrations as they travel to the inner ear. There, the vibrations
pass through fluid in a snail-shaped structure in the inner ear (cochlea).
Attached
to nerve cells in the cochlea are thousands of tiny hairs that help translate
sound vibrations into electrical signals that are transmitted to your brain.
The vibrations of different sounds affect these tiny hairs in different ways,
causing the nerve cells to send different signals to your brain. That's how you
distinguish one sound from another.
How
hearing loss can occur
Causes of hearing loss include:
Damage to the inner ear. Aging and prolonged exposure to
loud noise may cause wear and tear on the hairs or nerve cells in the cochlea
that send sound signals to the brain. When these hairs or nerve cells are
damaged or missing, electrical signals aren't transmitted as efficiently, and
hearing loss occurs. Higher pitched tones may become muffled to you.
It may
become difficult for you to pick out words against background noise. Heredity
may make you more prone to these changes. This type of hearing loss is known as
sensorineural hearing loss, which is permanent.
A gradual buildup of earwax. Earwax can block the ear canal
and prevent conduction of sound waves. Earwax blockage is a cause of hearing
loss among people of all ages. This can be restored with earwax removal.
Ear infection and abnormal bone
growths or tumors.
In the outer or middle ear, any of these can cause hearing loss.
Ruptured eardrum (tympanic membrane
perforation). Loud
blasts of noise, sudden changes in pressure, poking your eardrum with an object
and infection can cause your eardrum to rupture and affect your hearing.
RISK FACTORS
Factors
that may damage or lead to loss of the hairs and nerve cells in your inner ear
include:
Aging. Exposure to sounds over the years
can damage the cells of your inner ear.
Heredity. Your genetic makeup may make you
more susceptible to ear damage from sound or deterioration from aging.
Occupational noises. Jobs where loud noise is a regular
part of the working environment, such as farming, construction or factory work,
can lead to damage inside your ear.
Recreational noises. Exposure to explosive noises,
such as from firearms and jet engines, can cause immediate, permanent hearing
loss. Other recreational activities with dangerously high noise levels include
snowmobiling, motorcycling or listening to loud music.
Some medications. Drugs, such as the antibiotic
gentamicin and certain chemotherapy drugs, can damage the inner ear. Temporary
effects on your hearing — ringing in the ear (tinnitus) or hearing loss — can
occur if you take very high doses of aspirin, other pain relievers,
antimalarial drugs or loop diuretics.
Some illnesses. Diseases or illnesses that result
in high fever, such as meningitis, may damage the cochlea.
COMPLICATIONS
Hearing
loss can have a significant effect on your quality of life. Among older adults
with hearing loss, commonly reported problems include:
Depression
Anxiety
An often
false sense that others are angry with you
Unfortunately,
most people affected by hearing loss live with these difficulties for years
before seeking treatment — or never seek treatment at all. This may also cause
lasting problems for those who love you, if you try to cope by denying your
hearing loss or withdrawing from social interactions.
LIFESTYLE AND HOME REMEDIES
Hearing
loss prevention consists of steps you can take to help you prevent
noise-induced hearing loss and avoid worsening of age-related hearing loss:
Protect your ears in the workplace. Specially designed earmuffs that
resemble earphones can protect your ears by bringing most loud sounds down to
an acceptable level. Foam, pre-formed, or custom-molded earplugs made of
plastic or rubber also can effectively protect your ears from damaging noise.
Have your hearing tested. Consider regular hearing tests if
you work in a noisy environment. Regular testing of your ears can provide early
detection of hearing loss. Knowing you've lost some hearing means you're in a
position to take steps to prevent further hearing loss.
Avoid recreational risks. Some activities, such as riding a
snowmobile, hunting and rock concerts for long periods of time, can damage your
hearing. Wearing hearing protectors or taking breaks from the noise during loud
recreational activities can protect your ears. Turning down the volume when
listening to music can help you avoid damage to your hearing.
COPING AND SUPPORT
These tips
can help you to communicate more easily despite your hearing loss:
Position
yourself to hear. Face the person with whom you're having a conversation.
Turn off
background noise. For example, noise from a television may interfere with
conversation.
Ask others
to speak clearly. Most people will be helpful if they know you're having
trouble hearing them.
Choose
quiet settings. In public, such as in a restaurant or at a social gathering,
choose a place to talk that's away from noisy areas.
Consider
using an assistive listening device. Hearing devices, such as TV-listening
systems or telephone-amplifying devices, can help you hear better while
decreasing other noises around you. Telephone service over the Internet — known
as Voice Over Internet Protocol (VoIP) — transmits more frequencies from human
speech than does standard telephone service, which may make it easier to hear
on phone calls.