What is age-related hearing loss?

Age-related deafness (presbycusis) is that the loss of hearing that gently occurs in most folks as we get older. It is one among the foremost common conditions affecting older and elderly adults.

Approximately one in three people in the United States between the ages of 65 and 74 has hearing loss, and nearly half of those older than 75 have difficulty hearing. Having trouble hearing can make it hard to understand and follow a doctor's advice, respond to warnings, and hear phones, doorbells, and smoke alarms. Hearing loss can also make it hard to enjoy talking with family and friends, leading to feelings of isolation.

Age-related hearing loss most often occurs in both ears, affecting them equally. Because the loss is gradual, if you have age-related hearing loss you may not realize that you've lost some of your ability to hear.

There are many causes of age-related hearing loss. Most commonly, it arises from changes in the inner ear as we age, but it can also result from changes in the middle ear, or from complex changes along the nerve pathways from the ear to the brain. Certain medical conditions and medications may also play a role.

How do we hear?

Hearing depends on a series of events that change sound waves within the air into electrical signals. Your auditory nerve then carries these signals to your brain through a complex series of steps.

1)   Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum.

2)   The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.

3)   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. An elastic partition runs from the start to the top of the cochlea, splitting it into an upper and lower part. This partition is named the membrane because it is the bottom , or ground floor, on which key hearing structures sit.

4)   Once the vibrations cause the fluid inside the cochlea to ripple, a traveling wave forms along the basilar membrane. Hair cells-sensory cells sitting on top of the basilar membrane-ride the wave.

5)   As the hair cells move up and down, microscopic hair-like projections (known as stereocilia) that perch on top of the hair cells bump against an overlying structure and bend. Bending causes pore-like channels, which are at the ideas of the stereocilia, to open up. When that happens, chemicals rush into the cells, creating an electrical signal.

6)   The auditory nerve carries this electrical signal to the brain, which turns it into a sound that we recognize and understand.

Why do we lose our hearing as we get older?

Many factors can contribute to deafness as you get older. It can be difficult to distinguish age-related hearing loss from hearing loss that can occur for other reasons, such as long-term exposure to noise.

Noise-induced hearing loss is caused by long-term exposure to sounds that are either too loud or last too long. This kind of noise exposure can damage the sensory hair cells in your ear that allow you to hear. Once these hair cells are damaged, they do not grow back and your ability to hear is diminished.

Conditions that is more common in older people, like high vital sign or diabetes, can contribute to hearing loss. Medications that are toxic to the sensory cells in your ears (for example, some chemotherapy drugs) also can cause deafness.

Rarely, age-related deafness are often caused by abnormalities of the external ear or tympanic cavity . Such abnormalities may include reduced function of the tympanic membrane (the eardrum) or reduced function of the three tiny bones in the middle ear that carry sound waves from the tympanic membrane to the inner ear.

Most older people that experience deafness have a mixture of both age-related deafness and noise-induced deafness.

Can I prevent age-related hearing loss?

At this point , scientists do not know the way to prevent age-related deafness . However, you'll protect yourself from noise-induced deafness by protecting your ears from sounds that are too loud and last too long. It's important to remember of potential sources of damaging noises, like loud music, firearms, snowmobiles, lawn mowers, and leaf blowers. Avoiding loud noises, reducing the amount of time you're exposed to loud noise, and protecting your ears with ear plugs or ear muffs are easy things you can do to protect your hearing and limit the quantity of hearing you would possibly lose as you grow old.

What should I do if I even have trouble hearing?

Hearing problems can be serious. The most important thing you can do if you think you have a hearing problem is to seek advice from a health care provider. There are several types of professionals who can help you. You might want to start with your primary care physician, an otolaryngologist, an audiologist, or a hearing aid specialist. Each features a different sort of training and expertise. Each are often a crucial a part of your hearing health care.

Ø    An otolaryngologist is a doctor who specializes in diagnosing and treating diseases of the ear, nose, throat, and neck. An otolaryngologist, sometimes called an ENT, will try to find out why you're having trouble hearing and offer treatment options. He or she may also refer you to another hearing professional, an audiologist.

Ø    An audiologist has specialized training in identifying and measuring the type and degree of hearing loss. Some audiologists could also be licensed to suit hearing aids.

Ø    A hearing aid specialist is someone who is licensed by your state to conduct and evaluate basic hearing tests, offer counseling, and fit and test hearing aids.

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