Hearing Loss

Hearing loss is usually caused by either a temporary blockage or a permanent problem within the ear or brain that keeps sound from being heard or understood.

Saint Luke’s Hospital Midwest Ear Institute is dedicated to enhancing quality of life by restoring patients’ hearing. A nationally recognized cochlear implant center, our team of neuro-otologists have been restoring hearing with cochlear implants since 1980. We offer the full range of hearing services to both children and adults, from comprehensive diagnostics to hearing and balance treatment to our acclaimed cochlear implant program.

Saint Luke’s Hospital Midwest Ear Institute is staffed by a team of audiology experts who knows the importance of personalized care, and that one size doesn’t fit all – that’s why we offer patients the full range of hearing restoration services.

Understanding Hearing Loss

Understanding Hearing Loss

Graph showing normal and accelerated hearing loss.

As you age, some hearing loss is normal. But long-term exposure to loud noise can speed up the loss. You lose more than the ability to hear how loud a sound is. You also lose the ability to hear certain types of sounds. For example, you might not be able to hear some of the high-pitched sounds of a child's voice.

Normal loss

With aging, tiny hair cells in the inner ear undergo changes. Nerve cells, also part of the inner ear, can also be affected. This is called presbycusis. Most people don't notice normal hearing loss until their middle years. Others might not notice it until late in their lives. It's most often a slow and painless process.

Accelerated loss

Exposure to loud noise may cause brief hearing loss and ringing in your ears called tinnitus. If your exposure was short, you may recover. But long-term exposure day after day can affect your hearing for life.

Noise hurts more than your hearing

Did you know that loud noises can affect your whole body? Loud noises can:

  • Raise blood pressure

  • Disrupt sleep patterns

  • Cause muscle strain

  • Harm digestion

Types of Hearing Loss in Children

Types of Hearing Loss and Disorders in Children

Front view of ear anatomy.There are 3 main types of hearing loss:

  • Conductive hearing loss

  • Sensorineural hearing loss

  • Mixed hearing loss

Your child’s audiologist (healthcare professional who specializes in hearing problems) can tell you which type of hearing loss your child has. The audiologist can also help you determine the next steps of your child’s care.  

How we hear

The ear has 3 parts, each with its own task. The outer ear collects sound and sends it to the middle ear. There, sound is changed into vibrations. These vibrations travel to the inner ear where tiny “hair cells” (cilia) and the hearing nerve turn the vibrations into nerve impulses (signals). These signals are sent to the brain. The brain then figures out which ear the sound is coming from. With hearing loss, either a temporary blockage or a permanent problem within the ear or brain keeps sound from being heard or understood.

Conductive hearing loss

Conductive hearing loss is common in children. It can affect one or both ears. For someone to hear, sound signals must travel from outside the ear through the ear canal and eardrum into the inner ear. Conductive hearing loss results when sound becomes partially or fully blocked in the outer or middle ear. Some causes may include:

  • Fluid buildup behind the eardrum (often a complication of repeated ear infections)

  • Wax buildup in the ear canal

  • Problems with the eardrum

  • Infection

  • Growths

  • Abnormal formation of ear bones

  • Object stuck in the ear canal, such as food or a toy part

Conductive hearing loss is often temporary and may be improved with medical or surgical procedures. And once the blockage or problem is taken care of, hearing often returns to normal. If fluid buildup behind the eardrum is the cause, a tiny tube may be inserted into the eardrum to help drain the fluid. Your healthcare provider can tell you more about what’s causing your child’s hearing loss and how it can be treated or managed.

Sensorineural hearing loss

Sensorineural hearing loss can affect one or both ears. It is due to problems with the inner ear or damage to the hair cells or nerves inside the inner ear. To hear properly, these hair cells and nerves must process and carry sound to the brain. The brain then senses what we “hear.” With sensorineural hearing loss, the hair cells or nerves are damaged and do not send the signals needed for hearing to the brain. Some causes include:

  • Exposure to very loud noise

  • Infection of mother during pregnancy

  • Certain types of infection in the child

  • Medicines that are toxic to the ear (such as some IV antibiotics or cancer medicines)

  • Family history of permanent hearing loss

  • Premature birth

  • Severe jaundice

Sensorineural hearing loss is usually permanent. So treatment involves using devices that help the child hear as well as possible. These devices include:

  • Hearing aids. Electronic devices that make sound louder.

  • Cochlear implants. Surgically implanted devices that help the child sense sound. Cochlear implants are used when the hearing loss is too severe to be treated with hearing aids.

  • Assistive listening devices (ALDs) or Hearing Assistive Technology (HATS). ALDs, such as FM systems, require the person speaking to wear a microphone. The person’s voice is then transmitted into the child’s hearing aids, cochlear implants, or earphones. Assistive listening devices allow the child to hear the person speaking without distracting background noise. FM systems can be used in classrooms to help children with hearing loss hear their teachers.

Mixed hearing loss

Mixed hearing loss is a combination of conductive and sensorineural hearing loss. Treatment depends on the cause of the hearing loss. A combination of treatment methods can be used to help the child hear well.

Hearing disorders

Auditory processing disorder

A less common problem is auditory processing disorder (APD). APD occurs when the ear works properly, but the brain doesn’t interpret sound correctly. To hear words correctly, the brain must recognize and interpret the sounds that are sent to the brain. With APD, something keeps the brain from properly processing or interpreting the sounds that make up a word or words. So subtle differences between sounds in words cannot be heard and words are misheard. It is unknown why APD occurs. Some signs of APD include:

  • Poor listening skills

  • Trouble understanding speech and interpreting background noise

  • Trouble paying attention to and remembering information given orally (such as in a classroom)

  • Struggling with language, such as mixing up syllables in words

  • Trouble with reading, comprehension, spelling, and vocabulary

  • Poor performance, misbehavior, and frustration at school

Tests can be done to determine if your child has APD. Talk to your child’s healthcare provider if you think he or she needs to be tested. Your child's audiologist (a healthcare professional who specializes in hearing problems) can tell you which type of hearing disorder your child has. The audiologist can also help you determine the next steps of your child's care.

Auditory neuropathy spectrum disorder (ANSD)

In this condition, the inner ear works, but there is a problem that keeps the brain from recognizing and interpreting sound correctly. This causes words to be misheard. Sounds may also fade in and out. The cause of AN is unknown. Scientists think it may be related to problems with the hearing nerve, but more research needs to be done. There are hearing tests available to check for ANSD that can be done by your child's audiologist.

News

Overcoming Hearing Loss, Mighty Melody Continues Writing her Own Song
Melody Unger loves to fill the world with sound. If the spirited 8-year-old isn’t singing, she’s humming, playing the drums, asking questions, or playing make-believe. But for the first two years of her life, Melody lived in silence.
Deafness Can’t Quiet Mighty Melody
Melody spent 136 days in the NICU. She didn't respond to sound. Read about her journey to be able to finally hear.

Saint Luke’s Hospital Midwest Ear Institute

Saint Luke’s Hospital Midwest Ear Institute is staffed by a team of audiology experts who knows the importance of personalized care, and that one size doesn’t fit all – that’s why we offer patients the full range of hearing restoration services, from comprehensive diagnostics to hearing and balance treatment and our acclaimed cochlear implant program.